The CasinoTrust gambling glossary for Nigerian players

3

3-bet

The third bet in a betting round. Pre-flop in no-limit hold'em that means the first re-raise: the big blind counts as bet one, the open raise as bet two, and your re-raise as bet three. Size it around 3x the open when you are in position and 3.5–4x when you are out of position. A sound 3-betting range balances strong value hands with bluffs such as suited aces. Read the guide

6

6:5 blackjack

A table rule that pays a natural blackjack at only 6:5 (€12 on €10) instead of the standard 3:2 (€15). That single change piles roughly 1.4% onto the house edge, so a 0.5% game becomes a 1.9% game — worse value than European roulette. If a table or online lobby says "Blackjack pays 6 to 5", walk away and find a 3:2 game. Read the guide

A

Account verification

The identity, age and address checks an operator runs before it releases your withdrawal. Licensed sites are obliged to do this under KYC rules, and most ask for a photo ID (NIN slip, driver's licence, voter's card or international passport), a utility bill or bank statement less than three months old, and sometimes a screenshot of the payment method. Nigerian players who verify immediately after signing up avoid the classic delay on a first ₦100,000 cash-out. Read the guide

Accumulator / parlay

One bet built from two or more selections where every leg must land; the odds multiply together. Four legs at 1.80 return 10.50 to 1. What the slip does not show is that the bookmaker's margin compounds too — four legs at 5% margin each works out to roughly 19% overall. Popular on NPFL and Premier League weekends, entertaining, but poor value. Read the guide

Affiliate

A website or individual paid commission for sending players to an operator, usually as a share of net losses (revenue share), a fixed fee per funded account (CPA), or a mix of both. CasinoTrust states its affiliate relationships openly and orders platforms using a published protocol, never by who pays the most. Read the guide

All-in

Pushing every chip you have left into the pot. Nobody can force you out of a hand simply because you are short; once you are all-in, any further betting between the other players forms a side pot that you have no claim to. In tournament spots, let ICM — not raw chip count — guide the decision. Read the guide

American odds

The pricing format used in the United States. A plus number is the profit on a $100 stake (+150 means $150 profit); a minus number is the stake needed to win $100 (−200 means risking $200). Evens is written +100. For reference, +150 equals 2.50 in decimal odds and 3/2 fractional — most Nigerian betting sites default to decimal. Read the guide

American roulette

The 38-pocket wheel: 1–36 plus 0 and 00. That second zero lifts the house edge on every bet to 5.26%, and to 7.89% on the five-number "basket" bet — close to double the 2.7% you pay on European roulette. Since single-zero tables sit in the same online lobby, there is no argument for playing it. Read the guide

AML (Anti-Money Laundering)

The rules that force gambling operators to watch deposits and withdrawals, flag suspicious activity and prove where large sums came from. AML is the reason a casino can freeze a payout and ask for payslips or bank statements. Under EU and UK law, cumulative deposits of around €2,000 can trigger enhanced checks; Nigerian players sending funds abroad may also face bank-side source-of-funds questions. Read the guide

AMM (Automated Market Maker)

A smart contract that quotes prices from a liquidity pool using a formula instead of matching individual buyers with sellers. The first prediction markets ran on AMMs; the biggest platforms have since switched to order books because pricing is tighter. AMMs still cost traders through slippage on size, and liquidity providers through impermanent loss. Read the guide

Ante

A small compulsory bet every player puts in before cards are dealt, standard in tournaments and some cash games. Most modern events use a big blind ante, where a single player posts one big blind for the whole table. Antes swell the pot before the action starts, which rewards opening up your range. Read the guide

Arbitrage betting

Covering every outcome of an event across different bookmakers whose combined odds imply under 100% probability, so a profit is locked in whatever happens. Realistic margins sit at 1–3%. Be warned: bookmakers limit or shut arbers' accounts quickly, and prices can shift before you get the second leg on. Read the guide

Asian handicap

A market that deletes the draw by giving one team a head start measured in goals, often in quarters and halves. At −0.5 your team simply has to win; at −1.0 a two-goal win pays and a one-goal win is refunded as a push; −0.75 splits your stake evenly between −0.5 and −1.0. Heavily used on EPL and NPFL matches where one side is clear favourite. Read the guide

B

Baccarat

A two-hand comparison game — Player against Banker — where you back whichever total finishes nearer to 9. Face cards and tens are worth zero, aces one, and only the final digit of any total counts. Third cards are drawn by fixed rules, so there is nothing to decide once the bet is placed. The Banker wager's 1.06% house edge is among the cheapest in any casino. Read the guide

Bad beat

Losing a pot you were a big favourite to win at the moment the chips went in — pocket aces cracked by 7-2 offsuit on the river being the classic example. Bad beats are simply variance doing its job; keeping your head afterwards instead of tilting is one of the skills that separates winning players from the rest. Read the guide

Banker bet

Backing the Banker hand to win. It comes in front 45.86% of the time, loses 44.62% and ties 9.52%. Because it wins more often than the Player bet, casinos deduct a 5% commission from winnings, which still leaves a house edge of just 1.06% — the strongest bet on the baccarat table and one of the best anywhere in the casino. Read the guide

Bankroll

Money you have deliberately ring-fenced for gambling, kept apart from rent, school fees and feeding money, and which you can lose completely without it changing your life. Every staking decision should be a percentage of that bankroll — never a percentage of winnings, and never "whatever it takes to recover". Our bankroll management guide sets out sizing for each game. Read the guide

Bankroll (poker)

Funds reserved for poker alone, big enough to absorb swings. The usual benchmarks are 20–30 buy-ins for no-limit cash, 50–100 buy-ins for multi-table tournaments and 30–50 for sit & gos. A €2,000 roll comfortably covers €50 cash tables or €20–€40 tournaments. More detail in bankroll management. Read the guide

Basic strategy

The mathematically correct action — hit, stand, double, split or surrender — for every player total against every dealer up-card, worked out for the exact rules on the table. Play it without error in a six-deck S17 DAS game and the house edge drops to around 0.5%. The complete chart sits in our blackjack strategy guide. Read the guide

Bead plate

Baccarat's most basic scorecard: a six-row grid filled top to bottom and left to right, with Banker marked red, Player blue and Tie green. Some tables call it the "cube road". Every other display — the Big Road and the derived roads — is built from this raw record. Read the guide

Bet builder

A tool that welds several markets from one fixture into a single price — say the home team to win, over 2.5 goals and a named scorer. Those selections are correlated rather than independent, so bookmakers load them with a fatter margin than an ordinary accumulator carries. Treat the quoted odds with healthy scepticism. Read the guide

Bet limit

The smallest and largest stake a game or market will accept. Online table games commonly run from €0.10 up to €5,000, with live VIP tables going further. Sportsbooks apply limits market by market, and will slash an individual account's ceiling without warning once they tag the player as sharp or as a bonus hunter. Read the guide

Bet sizing

Deciding how much to risk relative to your bankroll and your edge. In casino games, where expectation is negative, smaller stakes simply slow the bleed and stretch your playing time; where the edge is positive — poker, genuine value bets — fractional Kelly staking grows the roll fastest while keeping drawdowns survivable. Read the guide

Biased wheel

A physical roulette wheel with a defect — a loose fret, a slight tilt, worn pockets — that makes certain numbers land more often than probability allows. Joseph Jagger exploited one in 1873 and Gonzalo García-Pelayo's team did it again in the 1990s. Casinos now inspect wheels constantly, and RNG roulette has no physical bias to find in the first place. Read the guide

Big blind

The bigger of the two compulsory bets put in before the deal, posted by the player sitting two seats to the left of the button, and the figure that names the stake (e.g. €0.50/€1). Tournament stacks are counted in big blinds: below 20bb you are short and should be leaning on a push-or-fold approach. Read the guide

Big Road

The main scoreboard above a baccarat table. Results run down in columns and a fresh column begins whenever the winning side changes, with ties drawn as a green slash through the previous result. Runs show up as long columns, which is exactly why pattern-chasers stare at it — even though every hand is independent of the last. Read the guide

Bitcoin (BTC)

The original and largest cryptocurrency, live since 2009 and widely used on Nigerian P2P desks. Crypto casinos accept it almost universally, though each on-chain confirmation takes roughly 10 minutes and fees rise with network congestion. Plenty of operators now push Lightning or stablecoins instead, for speed and steadier value. Read the guide

Blackjack (natural)

An ace alongside any ten-value card as your opening two cards — 21 on the spot. A fair table pays it at 3:2, and it beats every dealer hand except another natural, which is a push. From a six-deck shoe you will be dealt one about 4.75% of the time, roughly once in every 21 hands. Read the guide

Blacklist

The roll-call of operators a review site tells players to steer clear of, usually over unpaid winnings, tampered software, predatory terms or fake licensing. The CasinoTrust blacklist only names platforms with documented, still-unresolved player complaints, and lays out the evidence behind every entry. Read the guide

Blinds

The small blind and big blind — forced bets put up by the two players to the left of the dealer button before any cards appear, so there is money worth fighting for from the start. Tournament blinds climb on a fixed clock, which is what keeps the action moving and the field shrinking. Read the guide

Blockchain confirmation

Every fresh block mined on top of the one holding your transaction. Casinos typically credit Bitcoin deposits after 1–3 confirmations, so 10–30 minutes, while Ethereum or Polygon usually land inside a minute or two. Once a withdrawal is broadcast it is permanent — unlike a card payment, there is no chargeback to fall back on. Read the guide

Bluff

Betting or raising a hand that will almost certainly lose at showdown, purely to fold out something better. The maths is about fold equity against risk: a pot-sized bluff needs to work more than 50% of the time to break even, while a half-pot bluff only needs 33%. Read the guide

Bonus abuse

Working promotions in ways the terms explicitly ban — opening several accounts, grinding wagering through near-riskless bets, or hopping between brands under one parent company. The operator's answer is confiscation, so read the terms before you click accept. Advantage play strictly within published terms is not abuse, though few operators see it that way. Read the guide

Bonus buy

A slot option that lets you pay a set multiple of your stake, usually 50x–200x, to jump straight into the bonus round. RTP on the bought feature is sometimes a shade higher than the base game's, but the swings are brutal and your balance can vanish in a handful of spins. Banned in the UK since 2021 and curbed in several other regulated markets. Read the guide

Bookmaker

An operator that prices events, takes bets and earns from the margin baked into those prices — also called a sportsbook or, informally, a bookie. Big international names such as bet365 list thousands of markets a day; check availability from Nigeria and weigh them up in our sports betting comparison. Read the guide

Bounty / PKO

Tournament formats where part of every buy-in becomes a bounty collected by whoever knocks that player out. In progressive knockout (PKO) events half the bounty is paid to you in cash and half is added to the price on your own head. Bounties make calling wider than pure ICM would allow correct, particularly early on. Read the guide

Bubble

The point in a tournament immediately before the payouts begin: with 100 places paid, the bubble bursts the moment player 101 busts. ICM pressure is at its highest here, so short stacks fold almost everything to survive while big stacks can open with virtually any two cards and profit. Read the guide

Bust

Going over 21, which loses your bet there and then — even if the dealer goes on to bust in the same round. That imbalance, caused by the player acting first, is where most of blackjack's house edge comes from. The dealer busts about 28% of the time in total, most frequently when showing a 5 or a 6. Read the guide

Button

The nominal dealer seat, marked by a disc that moves one place clockwise after every hand. Whoever holds it acts last on the flop, turn and river, which makes it the most profitable chair at the table. Strong players open around 40–50% of hands on the button against roughly 15% from early position. Read the guide

Buy-in

What it costs to enter a tournament (quoted as, say, €100 + €9 fee) or the stack you sit down with in a cash game, normally 20 to 100 big blinds. The fee half of a tournament buy-in is the operator's cut, and it varies more than players expect — we compare it in our poker room reviews. Read the guide

C

Call bets

Wagers called out to the croupier instead of being laid down in chips, each covering a section of the wheel: voisins du zéro, tiers du cylindre, orphelins and neighbours. You will meet them on French and European tables and on the racetrack panel in most live online roulette. Underneath, they are nothing more exotic than bundles of straight-up and split bets. Read the guide

Card counting

Keeping a running tally of how many high cards (tens and aces) remain relative to low ones, then betting bigger when the shoe is loaded with high cards. A competent Hi-Lo counter can turn a 0.5–1.5% edge under good live conditions. It breaks no law, but a casino can still show you the door — and online RNG blackjack reshuffles after every hand, so counting achieves nothing there. Read the guide

Cascading reels

The mechanic — also sold as tumbling or avalanche reels — where winning symbols disappear and fresh ones drop into the gaps, so one spin can pay several times in a row. Developers usually bolt on a multiplier that climbs with each cascade. Gonzo's Quest (2011) is the game that made it mainstream. Read the guide

Cash out

The button that settles your bet early, at a price worked out from the odds as they stand. That price is never neutral: bookmakers shave roughly 5–10% off fair value before offering it. Handy for killing risk on a bad night, but leaning on it every weekend quietly drains your expected value. Read the guide

Cashback

A promotion that hands back a slice of your net losses over a set period, usually 5–25% weekly or monthly. Genuine cashback carries no wagering requirement, yet plenty of offers labelled cashback come with 1x–5x rollover attached, so read the small print. With 10% weekly cashback, a 96% RTP game effectively returns around 96.4% over the long run. Read the guide

CFTC

The US Commodity Futures Trading Commission, the regulator for derivatives — event contracts included. Kalshi runs under CFTC supervision as a Designated Contract Market, while Polymarket settled with the agency in 2022 and locked out US users for years before returning through a regulated entity. What the CFTC will tolerate decides which markets can be listed at all. Read the guide

Check-raise

Checking on purpose so you can raise once an opponent fires. Out of position it is one of the strongest weapons available, working both for value with made hands and as a bluff with draws. Lean on it too heavily and observant opponents will read you, so mix in hands you would happily have bet yourself. Read the guide

Closing line value (CLV)

The gap between the price you struck and the price the market settled on at kick-off. Regularly beating the close — taking 2.10 on a line that shuts at 1.90 — is the single most reliable sign of a sharp bettor, because the closing line is the most accurate estimate the market ever produces. Read the guide

Cluster pays

A slot format where wins come from clusters of five or more identical symbols touching side to side or top to bottom, with no paylines involved. Grids typically run from 6×6 up to 8×8. Pair it with cascades and a single spin can produce a long chain of wins. Read the guide

Cognitive biases

The predictable thinking errors that trip gamblers up: the gambler's fallacy, belief in the hot hand, illusion of control, confirmation bias and loss aversion. Knowing their names will not protect you — what works is deciding the rules before you play, such as deposit limits, a stop-loss and flat stakes. Read the guide

Cold wallet

Crypto storage kept off the internet — a hardware device or a paper key — so nobody can lift your private keys remotely. Keep long-term holdings there and shift only your session money to a hot wallet. Whatever you do, do not park your bankroll on the casino's own balance between sessions. Read the guide

Column bet

A stake on one of the three vertical columns of twelve numbers, paying 2:1. On a European wheel it covers 12 of the 37 pockets, so you win 32.4% of the time and pay exactly the same 2.7% house edge as every other bet on a single-zero table. Read the guide

Commission (baccarat)

The 5% cut the house takes from winning Banker bets, there to offset the Banker hand's built-in statistical advantage. Win €100 on Banker and €95 reaches your balance. Strip the commission out and the bet would hand the player a 1.24% edge; with it in place the house retains 1.06%. Read the guide

Comp points

Loyalty credit earned on real-money wagering and swapped later for bonus funds, free spins or prizes. A common rate is one point per €10 staked with 100 points worth €1 — a rebate of about 0.1%. Slots accumulate points far faster than table games because operators weight the rate by house edge. Read the guide

Continuation bet (c-bet)

The pre-flop raiser betting again on the flop, keeping the story going whether or not the board actually helped. On dry, high-card flops you can fire a small c-bet (25–33% of pot) with nearly your entire range; on wet, connected boards, c-bet less often and size up when you do. Read the guide

Continuous shuffling machine (CSM)

A machine that feeds played cards straight back into the shoe and keeps shuffling, so the composition never drifts far from a fresh deck. That kills card counting outright and speeds the game up, which means more hands per hour and a bigger expected loss for anyone playing basic strategy. Read the guide

Corner bet

Four numbers forming a square on the layout, backed by placing your chip on the shared corner, paying 8:1. On a European wheel that is 4 chances in 37, or 10.8%. Dealers also call it a square or a quad. Like every inside bet, it hands the house the usual 2.7%. Read the guide

Crypto casino

A casino that takes deposits and pays winnings in cryptocurrency, in many cases accepting nothing else. The upside is near-instant payouts, small fees and provably fair games — which is why Nigerian players who already buy USDT on P2P desks gravitate to them. The downside is lighter regulation (most hold Curaçao licences), price swings and very little recourse if things go wrong. See our crypto casino reviews. Read the guide

Curaçao GCB

The Curaçao Gaming Control Board, which took over from the old master-licence arrangement in 2024 under the National Ordinance on Games of Chance (LOK). Licences now come straight from the regulator, with tougher fit-and-proper, AML and complaint-handling obligations — though enforcement still lags well behind the UKGC or MGA. Read the guide

Cutoff

The chair directly to the right of the button and the second-best seat in the game. From here you can open wide — around 25–30% of hands — and attack the blinds, remembering that the button still gets to act after you. Read the guide

D

D'Alembert system

A negative progression: add one unit to your stake after every loss, take one off after every win. It is far gentler than the Martingale and rarely runs into table maximums, but it leaves the 2.7% house edge exactly where it was and still grinds your balance down over time. The full maths is in our roulette strategies guide. Read the guide

DAS (Double After Split)

The rule that lets you double down on a hand created by splitting a pair. It trims roughly 0.14% off the house edge versus a no-DAS game, because it lets you punish strong post-split hands — split 8-8, catch an 8-3 against a dealer 6, and you want that double available. Check the rules panel before you sit down. Read the guide

DCM (Designated Contract Market)

A CFTC-registered exchange with legal permission to list derivatives, event contracts included, for customers in the United States. Winning DCM status demands capital, market surveillance and formal dispute procedures. It is the line that separates a compliant US prediction market from an offshore one. Read the guide

Dealer peek

The rule under which a dealer showing an ace or a ten checks the hole card for blackjack before anyone acts. If the blackjack is there, you forfeit only your original stake, not the money you put out on doubles or splits. "No peek", or European no-hole-card rules, tack about 0.11% onto the house edge. Read the guide

Decimal odds

The European format, and the default on most Nigerian betting sites: the number shows total return per unit staked, stake included. At 2.50 a €10 bet returns €25, of which €15 is profit. Implied probability is simply 1 divided by the odds, so 2.50 means 40%. It is much the easiest format for working out accumulators and margins. Read the guide

Deposit limit

A responsible-gambling tool that caps what you can pay in per day, week or month — set it at, say, ₦20,000 a week and the site refuses anything beyond it. Raising a limit only takes effect after a cooling-off period of 24 hours to 7 days, while lowering it applies at once. UK-licensed operators must provide it and most serious sites elsewhere do too. Set yours before you need it. Read the guide

Derived roads

The three secondary baccarat scorecards — Big Eye Boy, Small Road and Cockroach Pig — which record whether the Big Road is running choppy or streaky rather than who actually won. They predict nothing, since every hand is independent, but they appear on every live baccarat table all the same. Read the guide

Dispute resolution

The formal path for taking on an operator. Open with live chat support, push it up to the complaints team, then take it to the independent ADR body named on the licence (eCOGRA or IBAS for UK sites). Save your screenshots, chat transcripts and transaction IDs — that evidence is what settles most cases. Read the guide

Double down

Doubling your stake after seeing your first two cards, in return for exactly one more card and no further choices. Basic strategy doubles hard 11 against everything but an ace, hard 10 against 2 through 9, and hard 9 against 3 through 6. Getting your doubles right is worth roughly 1.6% of your total return. Read the guide

Dozen bet

A stake on 1–12, 13–24 or 25–36 at 2:1. Twelve numbers means a 32.4% chance on a European wheel. Cover two dozens at once and you are live on 64.9% of spins, yet the long-term loss rate is still precisely 2.7%. Read the guide

Dragon Bonus

A baccarat side bet that pays according to how comfortably your chosen hand wins. A natural win returns 1:1, while a nine-point margin pays 30:1. The house edge is roughly 2.65% backing Player and 9.37% backing Banker — a long way worse than the main bets sitting right beside it. Read the guide

Dragon Tiger

A stripped-down variant dealing one card to Dragon and one to Tiger, with the higher card winning at 1:1. Ties give you half your stake back, which leaves the main bet with a house edge of about 3.73% in an eight-deck game. Live casinos love it because rounds finish in seconds. Read the guide

Draw no bet

A two-way market that refunds your stake if the game finishes level. Mathematically it is the same thing as an Asian handicap of 0.0, and you pay for that safety net with shorter odds than the standard 1X2 market offers. Read the guide

Drawdown

How far your bankroll falls from its high point to its low point over a stretch. Even genuinely winning poker players and bettors ride out drawdowns of 20–40% of their roll from ordinary variance. Sizing the bankroll so a realistic drawdown does not finish you off is the heart of money management. Read the guide

E

Each-way

One bet cut into two equal halves: half on your selection to win, half on it to place — top 2, 3 or 4 depending on the size of the field. The place half settles at a fraction of the win odds, normally 1/4 or 1/5. You will see it most in horse racing and golf. Read the guide

eCOGRA

eCommerce Online Gaming Regulation and Assurance, a testing house based in London and running since 2003. It audits random number generators, publishes monthly payout figures for certified operators and serves as an approved alternative dispute resolution (ADR) body for UK-licensed sites. A genuine eCOGRA seal is clickable and opens the operator's current certificate. Read the guide

En prison

A French roulette rule under which a zero does not kill your even-money bet outright — it is "imprisoned" for one further spin. Win that spin and your original stake comes back. The effect is to halve the even-money house edge to 1.35%, which makes French roulette with en prison the best version of the game you can find. Read the guide

Equity

The slice of the pot that belongs to you based on how often you would win at showdown if every remaining card were dealt. Pocket aces hold about 81% equity against a random hand before the flop; a flush draw carries roughly 35% on the flop against a made hand. Every pot-odds decision starts from this number. Read the guide

Ethereum (ETH)

The number-two cryptocurrency and the leading smart-contract platform. Most crypto casinos accept ETH directly, and it settles ERC-20 tokens such as USDT and USDC. Mainnet gas can cost several dollars per transaction, so if your deposit is modest, layer-2 networks like Arbitrum and Polygon save real money. Read the guide

European roulette

The 37-pocket single-zero wheel. Every bet on it concedes a 2.7% house edge (1/37), with straight-up numbers paying 35:1 when the true odds are 36:1. It is the default online and should always be chosen ahead of the American double-zero wheel. Read the guide

Even money

The dealer's offer to settle your blackjack at 1:1 straight away when an ace is showing, so you avoid the risk of a push. It is arithmetically the same thing as taking insurance, and it is a losing proposition: against an ace your blackjack is worth roughly 1.04 units, so accepting 1.00 hands the difference to the house. Read the guide

Even-money bets

Red/black, odd/even and high (19–36)/low (1–18) — eighteen numbers apiece, paying 1:1. On a European wheel you win 48.6% of spins. Where la partage or en prison applies the house edge falls to 1.35%; without either it stays at 2.7%, and rises to 5.26% on American wheels. Read the guide

Event contract

A contract that pays a fixed sum — normally $1 — if a specified event happens, and nothing at all if it does not. Any price between $0 and $1 is the market's probability estimate, so a "Yes" share trading at $0.62 says 62%. Every prediction market is built out of these. Read the guide

Exchange betting

A peer-to-peer market — Betfair being the best-known — where users back and lay outcomes against each other. The exchange earns a commission of 2–5% on net winnings instead of burying a margin inside the odds. Crucially, exchanges do not limit winning accounts, which is why serious bettors rely on them. Read the guide

Expected value (EV)

What a bet wins or loses on average once you repeat it enough times: multiply each outcome's probability by its payout and add them up. Stake €10 on one number at European roulette and the EV is −€0.27, exactly the 2.7% house edge. Chasing positive EV (+EV) is the whole job for a professional. Read the guide

Exploitative play

Stepping away from game-theory-optimal lines to punish a specific opponent's habits — bluffing more against someone who folds too readily, value-betting thinner against a calling station. Against weak players it earns more than GTO, but it opens you up to being counter-exploited by anyone paying attention. Read the guide

F

Fair play certificate

An audit issued by an independent lab such as eCOGRA, iTech Labs, GLI or BMM, confirming that a game's random number generator produces unpredictable, evenly distributed results and that the advertised RTP matches the underlying maths model. Look at the date, and check that the certificate names the operator itself rather than only the games studio. Read the guide

Fibonacci system

A negative progression that walks along 1, 1, 2, 3, 5, 8, 13… — one step up after a loss, two steps back after a win. Stakes rise more slowly than under the Martingale, but a bad run still drags you into uncomfortable bet sizes, and your expected loss stays fixed at 2.7% of everything you turn over. Read the guide

Fish

Table slang for a losing player: too many hands played, too many calls, draws chased without the odds to justify them. Poker profit flows mainly from fish, which is why choosing the right table matters as much as your technical game. The opposite is a "shark" or a "reg". Read the guide

Fixed jackpot

A top prize set in advance, quoted either as a multiple of your stake (5,000x, for instance) or as a flat sum. Because it does not grow and takes no slice from each spin the way a progressive does, the base game keeps its full RTP. Read the guide

Flop, turn, river

The community-card streets in hold'em and Omaha: three cards at once on the flop, a fourth on the turn, and a fifth and final one on the river. A betting round follows each of them, which together with pre-flop gives four rounds of betting per hand. Read the guide

Fold equity

The slice of your expected value that comes purely from opponents folding. A bet holding only 30% equity when called can still print money if it gets a fold 40% of the time. Fold equity peaks against tight players and when your sizing puts a serious chunk of their stack at risk. Read the guide

Fractional odds

The old UK format, quoting profit against stake: 5/1 pays €5 profit for every €1 risked, and 1/2 pays €0.50 per €1. To convert, divide and add one — 5/1 becomes 6.00, 1/2 becomes 1.50. Implied probability for 5/1 is 1/6, or 16.7%. Read the guide

Free spins

Slot rounds you play without staking, arriving either as a feature inside the game or as a promotion. Promotional spins are usually pegged at a fixed value, often €0.10 apiece, and anything you win carries wagering of 20x–50x. Fifty spins at €0.10 on a 96% RTP slot are worth around €4.80 before that wagering bites. Read the guide

Freeroll

A tournament that costs nothing to enter yet pays real money, bankrolled by the operator as marketing. Expect small pools — often €50–€500 — and enormous fields. The word has a second meaning at the cash tables: a spot where you cannot lose but might win, such as a tied hand that also holds a flush draw. Read the guide

Freezeout

The tournament format with one entry per player and no re-buys or re-entries: lose your chips and your day is finished. It remains the classic structure for major events and the truest measure of survival skill, because nobody gets to fire a second bullet. Read the guide

Futures / outrights

Bets on how a whole competition ends rather than a single fixture — the NPFL title, a tournament winner, a season total. The odds are long and your money is locked up for months. Margins on outright markets can climb past 30%, so compare prices across several books before committing. Read the guide

G

Gambler's fallacy

The conviction that what already happened changes what comes next — that red is "due" after six blacks, or that a slot owes you a win. Each spin stands alone, and the chance of red remains 18/37 every time. This one belief props up every roulette system ever sold and most loss-chasing. Read the guide

Game weighting

How much of each stake actually counts toward clearing a wagering requirement, set by game type. Slots normally count in full at 100%, roulette and blackjack at just 5–10%, and a few high-RTP titles at nothing. Bet €100 on blackjack weighted at 10% and only €10 is credited, so a €1,000 requirement would demand €10,000 of blackjack action. Read the guide

GamStop

Britain's free national self-exclusion register. Sign up and every UKGC-licensed online operator is closed to you for six months, one year or five years, with no way to lift it early. Offshore sites sit outside the scheme, which is precisely why "non-GamStop casinos" advertise to excluded players — treat that marketing as a red flag. Read the guide

Gas fee

What you pay blockchain validators to process a transaction, charged in the network's own token. Ethereum mainnet can cost anywhere from under $1 to $50 and more when the network is busy, while Tron, Solana and Polygon usually run to a few cents — which matters when your deposit is ₦20,000 rather than ₦2 million. Confirm which network the casino supports before you send: coins pushed to the wrong chain are usually gone for good. Read the guide

GTO (Game Theory Optimal)

A strategy nobody can exploit, because value bets and bluffs appear at frequencies that leave an opponent no profitable response. Solvers grind out approximations for specific spots. In real games GTO is the baseline you learn first and then deliberately deviate from once opponents start making mistakes. Read the guide

H

H17 / S17

Shorthand for whether the dealer hits (H17) or stands (S17) on soft 17, an ace with a six. H17 costs the player about 0.22% because it gives the dealer extra chances to repair a weak hand. S17 is the friendlier rule, and it is what most online tables and most European live tables use. Read the guide

Hand ranges

Every hand an opponent could plausibly be holding in a spot, rather than the one hand you imagine. Ranges are written as a share of all 1,326 combinations or drawn on a grid. Reasoning this way — "he 3-bets roughly 8% from here" — is the basis of all modern poker study. Read the guide

Handicap

A market handing one side a virtual head start to even out the prices. Give the favourite −1.5 and they have to win by two clear goals. Handicaps come in whole numbers, halves and — in Asian markets — quarters. American sports call the same idea the point spread. Read the guide

Hard hand

Any blackjack hand without an ace, or one where the ace has to count as 1 to keep you under 21. Hard 16 is the ugliest holding in the game: basic strategy hits it against a dealer 7 or better and surrenders against 9, 10 or ace wherever surrender is offered. Read the guide

Heads-up

Two-handed play, whether as its own format (heads-up cash games or sit & gos) or as the closing stage of a tournament. Ranges blow wide open: the button should be raising 70–80% of hands, and something as thin as king-high frequently takes the pot at showdown. Read the guide

Hi-Lo count

The card-counting system almost everyone learns first. Cards 2 through 6 score +1, 7 to 9 score 0, and tens plus aces score −1. Divide the running count by the decks left in the shoe for the true count; every +1 of true count moves roughly 0.5% of edge toward the player. Push your bets up once the true count reaches +2. Read the guide

Hit frequency

How often a slot returns anything at all, win size aside. Most sit somewhere between 20% and 35%, so a game rated at 25% pays on about one spin in four. Do not confuse it with RTP — plenty of those "wins" come back smaller than the stake that bought them. Read the guide

Hold and win

A bonus format where six or more special symbols — usually coins — launch a respin round. Every fresh coin resets the counter to three respins, and the feature closes when the grid fills up or the respins run out. Your payout depends on the coin values collected plus any mini, minor, major or grand jackpot landed. Read the guide

Hold'em

Texas hold'em, far and away the most played poker game. Two private cards each, five community cards on the table, and the best five-card combination takes the pot. In no-limit hold'em (NLHE) you can move any amount up to your whole stack at any point. Our how to play poker guide walks through the rules. Read the guide

Hole card

The dealer's face-down card. American rules deal it immediately and let the dealer peek for blackjack; European no-hole-card rules hold it back until every player has acted, which nudges the house edge up when you have doubled or split against an ace or a ten. Read the guide

Hot hand

The feeling that a player or a machine on a run is more likely to keep winning. In games of pure chance it is simply wrong. In skill games researchers have found small real effects, but they are far weaker than the feeling suggests and never a reason to raise your stakes. Read the guide

Hot wallet

Any crypto wallet that lives online — a phone app, a browser extension, an exchange balance. It is the convenient way to fund a casino account and also the exposed one, vulnerable to phishing links and malware. Keep only what you can afford to lose there and switch on two-factor authentication. Read the guide

House edge

The mathematical advantage the operator holds, stated as the share of every bet it expects to keep over the long run. Banker in baccarat is 1.06%, blackjack played with basic strategy about 0.5%, European roulette 2.7%, American roulette 5.26%, and slots generally 2–8%. It is simply 100% minus the RTP. Read the guide

House money effect

The habit of gambling recklessly with fresh winnings because they feel like the casino's money rather than yours. They are not — every chip in front of you belongs to you, and so does every naira you withdraw. Ring-fencing part of any decent win, the stop-win rule, is the discipline that beats this bias. Read the guide

I

ICM (Independent Chip Model)

The model that turns tournament chip stacks into real cash value by estimating how often each player finishes in each paid position. Since chips are worth less at the margin the more of them you hold, ICM explains why calling an all-in near the bubble needs far more equity than plain chip EV suggests. Run the numbers in our ICM calculator. Read the guide

iGaming

The trade's catch-all for online gambling of every kind — casino, poker, sports betting, bingo and lotteries. By the mid-2020s the global market was estimated at well over US$90 billion in gross gaming revenue, with Europe the biggest regulated region and crypto-first operators expanding quickest across unregulated and grey markets, Africa included. Read the guide

Illusion of control

The belief that a random result bends to your choices, rituals or skill — choosing your own numbers, throwing the dice harder, tapping the spin button at the right second. Casinos build interactions that feed the feeling because it keeps people playing. None of it moves the maths a single point. Read the guide

Implied odds

Pot odds with the money you expect to win on later streets folded in, assuming your draw lands. Set-mining with a small pair needs something like 15:1 in implied odds, because you flop a set only 11.8% of the time — so the stacks sitting behind have to be deep enough to pay you off. Read the guide

Implied probability

The chance of winning that a price is quoting, found by dividing 1 by the decimal odds. So 1.50 is saying 66.7% and 4.00 is saying 25%. Add up the implied probabilities across every outcome in a market and you get the overround; whatever sits above 100% is the bookmaker's margin. Read the guide

In-play / live betting

Betting after the whistle has gone, with prices refreshing as the game moves. Live markets now carry most of the industry's online turnover. Bookmakers hold every bet for a few seconds before accepting it and generally price in wider margins than they do pre-match — and on a shaky mobile connection that delay works against you. Read the guide

Inside bets

Everything placed on the numbered grid itself: straight up (35:1), split (17:1), street (11:1), corner (8:1), six line (5:1) and, on American layouts, the basket. Big payouts, small chances. The house edge is exactly the same as on outside bets at the same wheel. Read the guide

Insurance

The side bet offered whenever the dealer shows an ace, paying 2:1 if a blackjack is underneath and costing half your original stake. Only 4 of the 13 ranks are worth ten, so the true price is about 9:4 against — leaving insurance with a house edge near 7%. Turn it down unless you are counting cards. Read the guide

J

Jackpot

The biggest prize a game can hand over. Fixed jackpots are a stated sum; progressives climb with every bet placed until somebody lands them. Networked pools such as Mega Moolah have paid out more than €18 million. Jackpot slots usually run a lower base RTP, because 1–5% of each bet is siphoned off to feed the pool. Read the guide

K

Kelly criterion

The formula that tells you what share of your bankroll to risk when you genuinely hold an edge: f = (bp − q) / b, where b is the net odds, p your win probability and q = 1 − p. Hold a 55% edge at even money and full Kelly says stake 10%. Most professionals use a quarter or half Kelly to keep the swings survivable. Read the guide

KYC (Know Your Customer)

The verification rules obliging an operator to establish who you are, either before you play or shortly after. The usual pack is a government ID — NIN slip, passport or driver's licence — plus proof of address and evidence that the payment method belongs to you. "No-KYC" crypto casinos skip the step at sign-up, but AML rules still let them ask for papers before a big withdrawal. Read the guide

L

La partage

The French roulette rule that gives you half your even-money stake back when zero lands. That single concession halves the house edge on those bets from 2.7% to 1.35%. Most live French roulette tables online apply it, but read the rules panel — some tables badged "French" quietly leave it out. Read the guide

Labouchère system

A cancellation progression: jot down a line such as 1-2-3-4, stake the first number plus the last, strike both out when you win, and add the amount lost to the end when you do not. Clear the whole line and you have won its total. Like every progression, it collapses against the house edge and the table maximum. Read the guide

Late surrender

Giving up half your stake and folding the hand after the dealer has checked for blackjack. It is the right call when your hand is hopeless against a strong up-card: hard 16 facing 9, 10 or ace, and hard 15 facing a 10. Used properly it shaves about 0.07% off the house edge. Read the guide

Licence

Formal permission to run gambling, granted by a regulator with authority over the operator or its players. Tier-one licences — UKGC, MGA, Sweden's Spelinspektionen, Denmark's Spillemyndigheden — come with serious player protection, while Curaçao and Anjouan are much lighter touch. Nigeria's own market answers to the National Lottery Regulatory Commission (NLRC) and state lotteries boards, so most offshore sites carry a foreign licence: click the footer seal and confirm it is live. Read the guide

Lightning Network

A second layer built on top of Bitcoin that clears payments instantly for a fraction of a cent. More and more crypto casinos now take Lightning deposits and pay withdrawals through it, which removes the ten-minute wait that on-chain Bitcoin forces on you. Read the guide

Lightning Roulette

Evolution's live variant in which between one and five random "lucky numbers" per spin are struck with multipliers of 50x to 500x on straight-up bets. That extra value is paid for by dropping ordinary straight-up wins to 29:1 instead of 35:1. Overall RTP lands at 97.3%, matching standard European roulette, but the ride is far bumpier. Read the guide

Limit order

An instruction to buy or sell at a stated price or better, which sits on the order book until it is filled or you pull it. On prediction markets, working limit orders instead of hitting the market saves you the spread and frequently earns maker rebates on top. Read the guide

Limp

Coming into a pot pre-flop by flat-calling the big blind rather than raising. Open-limping is usually a weak choice in no-limit hold'em: it hands over the initiative and drags extra players in. There are narrow exceptions, mainly from the small blind and with very short stacks. Read the guide

Line shopping

Checking the same bet at several bookmakers and taking the best number on offer. The gap between 1.90 and 2.00 on one selection is worth roughly 5% of your stake, and across a full season that habit alone can move a break-even bettor into profit. Keep two or three accounts open so you always have a choice. Read the guide

Liquidity

How much money can change hands before the price shifts. With $2 million resting on the order book you can buy $10,000 of shares at close to the quoted price; in a thin market a $500 order might drag it ten cents. In practice, liquidity is the biggest difference between one prediction market and another — see our prediction market reviews. Read the guide

Live casino

Real tables with human dealers, streamed from a studio and played through a video interface. Evolution, Pragmatic Play Live and Playtech supply most of what you will see. Rules and house edges match the land-based versions, so live blackjack and baccarat often beat their RNG counterparts on value — just be aware the stream eats mobile data, and hands play slower. Read the guide

Loss aversion

The well-documented finding that a loss stings roughly twice as much as an equal win pleases. At the tables it fuels chasing, refusing to walk away while down, and grabbing poor cash-out offers just to bank something. Limits agreed in advance take the decision away from the version of you that is emotional. Read the guide

Loss chasing

Raising stakes or extending the session to win back what you have already lost. It is the clearest warning sign of gambling harm there is, and the mechanism that turns one bad night into a genuine crisis. The moment you catch yourself doing it, stop — a time-out is the correct next move. Read the guide

Loyalty programme

A tiered scheme that pushes value back to regular players as points, cashback, quicker withdrawals, a personal manager or event invitations. Tiers usually track wagering volume over a rolling window. Genuine value rarely tops 0.5–1% of turnover, so never stake beyond your plan just to climb a level. Read the guide

M

Market maker

A participant quoting both a buy and a sell price at all times, earning the spread in exchange for supplying liquidity. On prediction markets that role may be filled by the platform itself, by professional trading firms, or by ordinary users paid to do it. Without market makers, prices go stale and spreads widen out. Read the guide

Martingale

Doubling up after each losing even-money bet, on the theory that one win wipes out every loss and leaves you a unit ahead. It breaks down because long losing runs are ordinary — ten reds on the bounce shows up roughly once in 780 sequences — and because your bankroll or the table ceiling arrives first: ten losses starting at €5 means the next bet is €5,120. Read the guide

Max bet rule

The bonus condition that caps your stake per spin or hand while bonus funds are in play, commonly €5 or 10% of the bonus. Break it just once and the operator can void every naira of bonus winnings. It exists to stop players clearing wagering in a handful of huge spins — read it before your first bonus spin, not after. Read the guide

Max cashout

A ceiling on what you may withdraw from winnings produced with bonus money, no matter how much appears on screen. No-deposit offers almost always carry one, often around €100, and deposit matches sometimes cap at 5x–10x the bonus. Anything above the cap is stripped out when you request the payout. Read the guide

Max win

The largest amount a single spin can return once every feature is counted, quoted as a multiple of the stake. High-volatility releases advertise anywhere from 5,000x to 100,000x. The odds of actually hitting it are normally listed in the game info screen and often work out around one in several million spins. Read the guide

Megaways

A reel engine licensed from Big Time Gaming where each reel shows a different number of symbols on every spin, giving up to 117,649 ways to win on a six-reel game (7^6). Wins are counted along adjacent matching symbols from the left. Megaways titles are usually high volatility and pair the engine with cascading reels. Read the guide

Memo / tag

An extra identifier that must travel with the address for certain coins — XRP, XLM and many exchange deposit addresses. Leave the memo out when funding a casino and the money may never reach your balance. Copy both fields exactly, and send a small test amount first if the sum is meaningful. Read the guide

MGA (Malta Gaming Authority)

Malta's regulator, up and running since 2001 and one of the most credible licences an operator serving Europe can hold. It demands segregated player funds, published RTP figures, responsible-gambling tools and access to an independent ADR body. A single MGA framework covers both B2C operators and B2B games suppliers. Read the guide

Moneyline

A plain bet on who wins, with no handicap attached. American sportsbooks quote it in US odds (Lakers −150, Celtics +130). In football the equivalent is the 1X2 market, where the draw sits alongside the two teams as a third selection. Read the guide

MTT (Multi-Table Tournament)

A tournament spread across many tables that merge as players bust, until one table and finally one player is left. Around 10–20% of the field usually gets paid, and the champion takes 15–25% of the pool. Variance is severe — even top players cash only 15–20% of the time. Read the guide

Multiplier

Anything that boosts a win by a stated factor — 2x, 5x, and up past 100x inside some bonus rounds. Multipliers can ride on wild symbols, climb with each cascade, or build up across a free-spins round. They are what makes the enormous max wins on modern slots mathematically possible. Read the guide

Must-drop jackpot

A progressive that is contractually obliged to pay before a deadline — hourly or daily — or before it climbs past a set figure such as €50,000. The nearer the deadline, the higher the expected value of each spin becomes, since the prize has to go somewhere, which is why "must drop by" pools draw advantage players. Read the guide

N

Natural (baccarat)

A two-card total of 8 or 9 on either side. As soon as a natural appears, drawing stops and the hand is settled on the spot. The chance that at least one of the two hands shows a natural from its first two cards is roughly 34%. Read the guide

Neighbours bet

A wager on one number together with the two sitting either side of it on the wheel — five numbers in all — placed through the racetrack panel. "Zero and neighbours" takes in 3, 26, 0, 32 and 15. It costs five chips and returns 35:1 on whichever number lands. Read the guide

No-commission baccarat

The version that drops the 5% charge on Banker wins but pays only half your stake when Banker wins with a total of 6. That outcome turns up in about 5.4% of hands and lifts the Banker house edge from 1.06% to 1.46%. The name sounds generous; the maths says it is worse than standard baccarat. Read the guide

No-deposit bonus

Bonus funds or free spins dropped into a new account without any deposit. The sums are small — €5–€20, or 10–50 spins — and the strings are heavy: wagering of 30x–60x, a max cashout around €100, and full KYC before anything is paid. Think of it as a free demo, not a route to profit. Read the guide

No-KYC casino

A crypto casino you can join and play at with nothing but an email address or a connected wallet — no documents at the door. Almost all of them still reserve the right to demand KYC before a large withdrawal or where activity looks irregular, because their licence requires it. Our no-KYC crypto casino reviews set out the trade-offs. Read the guide

Non-sticky bonus

A bonus structure where your own deposit is played through first and the bonus sits to one side untouched. Withdraw at any point and you keep the real-money winnings, simply forfeiting the bonus. Some operators call it a parachute bonus. At the same headline figure it is always better for the player than a sticky bonus. Read the guide

Nuts

The strongest hand available given the cards on the table. On a 9-T-J board with two hearts, K-Q makes the nut straight. The next best holding is the "second nuts". Being able to name the nuts instantly — and know whether you hold it — is one of the first reading skills to develop. Read the guide

O

Omaha

A hold'em cousin dealing four hole cards, of which you must use exactly two together with exactly three from the board. Pot-limit Omaha (PLO) is the version you will find running. Winning hands are much bigger than in hold'em and equities between two hands sit far closer together. Read the guide

On-chain

A transaction written straight onto a blockchain, rather than an internal balance move inside an exchange or a casino. On-chain transfers are public and cannot be reversed; when a casino pays you out it hands over a transaction hash you can paste into a block explorer to follow the money. Read the guide

Oracle

Whatever tells a smart contract how an event actually finished. Centralised oracles put that job in the platform's hands, while decentralised designs such as UMA let token holders vote on disputed results. Oracle failure and woolly resolution wording are the main counterparty risks on on-chain markets. Read the guide

Order book

The live list of outstanding buy (bid) and sell (ask) orders at each price. The distance between the best bid and the best ask is the spread. Order-book prediction markets such as Polymarket and Kalshi publish depth, so you can size up liquidity before you commit money. Read the guide

Orphelins

The "orphans" — the eight numbers left out of voisins du zéro and tiers: 1, 6, 9, 14, 17, 20, 31 and 34. Five chips cover them, one straight up on 1 plus four splits (6/9, 14/17, 17/20, 31/34). That is 21.6% of a European wheel. Read the guide

Outs

The cards still to come that would turn your hand into a winner. A flush draw holds nine outs, an open-ended straight draw eight, a gutshot four. Double your outs for the rough chance of hitting on the next card, or quadruple them with two cards left — the rule of 2 and 4. Read the guide

Outside bets

Everything sitting outside the numbered grid: the even-money bets at 1:1, plus dozens and columns at 2:1. They land far more often for smaller returns, and the house edge is identical to the inside bets unless la partage or en prison is in play. The sensible choice for making a modest bankroll last. Read the guide

Over/under (totals)

A bet on whether the combined score finishes above or below a line the bookmaker sets — 2.5 goals in football, 220.5 points in basketball. Half-point lines exist so the bet can never be a push. Totals are popular precisely because you never have to name a winner. Read the guide

Overround

The implied probabilities of a market added together, shown as the percentage above 100. Price a match at 2.10 / 3.40 / 3.60 and the total is 104.8%, so the overround is 4.8%. The lower it goes, the better for you: sharp books operate at 2–3%, recreational ones at 5–8% or worse. Read the guide

P

Pair bets

Baccarat side bets backing the first two cards of Player or Banker to pair up, paying 11:1. In an eight-deck shoe that happens about 7.47% of the time, which leaves a house edge near 10.36%. Perfect Pair, requiring the same suit, pays 25:1 and costs you even more. Read the guide

Paylines

The fixed routes across the reels along which matching symbols have to land to pay. Classic slots carry 1–25 lines, video slots usually 20–50, and some run 243 or 1,024 "ways" instead. Where a game lets you switch lines off, RTP per line is unchanged — you are only lowering your total stake per spin. Read the guide

Payout speed

How long it takes for a withdrawal to leave the operator and reach you. Crypto casinos often settle within minutes, e-wallets within hours, while cards and bank transfers run 1–5 working days — and a payout to a Nigerian bank account can add a day at the local end. The number that really matters is internal processing time, because that is the part the operator controls. CasinoTrust times it in every review. Read the guide

Pending period

The gap between asking for a withdrawal and the operator actually processing it, during which many sites still let you cancel the request and put the money back into play. That reverse button is a documented driver of harm; operators with serious responsible-gambling standards, and every UKGC site, have removed it. Read the guide

Penetration

How much of the shoe is dealt before the cut card triggers a reshuffle. Counters need deep penetration — 75% or more of a six-deck shoe — because the count only becomes trustworthy late on. Plenty of live online tables cut at 50%, which strips most of the value out of counting. Read the guide

Player bet

Backing the Player hand, paid at 1:1 with nothing deducted. It wins 44.62% of hands, loses 45.86% and ties 9.52%, which works out to a house edge of 1.24%. A shade behind Banker, yet still far better value than most bets on a casino floor. Read the guide

Point spread

What Americans call a handicap, used mostly in NFL and NBA betting. A −7.5 spread means your favourite has to win by eight or more. Both sides of a standard spread are priced at −110, which hands the bookmaker a 4.5% margin — the "vig". Read the guide

Polymarket

The biggest crypto-native prediction market, running on Polygon, settling in USDC, with an order book and UMA-based resolution. It broke into mainstream news during the 2024 US election on the back of billions in volume. Our full Polymarket guide covers fees, resolution rules and the risks. Read the guide

Position

Where you are sitting relative to the button, which decides whether you act before or after your opponents. Acting last gives you more information and control over how big the pot gets. Nine-handed, the seats run UTG, UTG+1, UTG+2, lojack, hijack, cutoff, button, small blind, big blind. Read the guide

Pot odds

The size of the pot measured against what your call costs, set beside your chance of winning. If someone bets €20 into €60, you are risking €20 to win €80, so you need better than 20% equity — one in five. A flush draw with one card left is about 19.6%, which makes it a marginal call on pot odds alone. Read the guide

Prediction market

An exchange where people trade contracts on future events — elections, sports, inflation prints, crypto prices. Because prices pool what traders collectively know, they tend to forecast well. In the US the regulated venues operate as CFTC exchanges; elsewhere they run on-chain and settle in crypto. Read the guide

Private key

The secret number that controls a crypto wallet — hold it and you can spend the funds. It is normally written out as a 12- or 24-word seed phrase. Never type it into a casino page and never send it to anyone claiming to be "support": no legitimate operator will ever ask, and this is the single most common way Nigerian players get cleaned out. Read the guide

Progressive jackpot

A prize that swells because a slice of every bet is pushed into the pool — on one machine (local), across one operator (in-house) or across many operators (networked). Once it drops it resets to a seed figure. Funding that seed is why the base game runs a lower RTP, frequently under 90%. Read the guide

Provably fair

The cryptographic setup, used mainly by crypto casinos, that lets you check afterwards that a result was not tampered with. The server publishes a hashed seed before you bet, the outcome is generated from that server seed, your client seed and a nonce, and you can verify the arithmetic yourself. It proves the draw was honest — it says nothing about whether the RTP is good. Read the guide

Punto Banco

The standard baccarat played in casinos everywhere and in every online lobby, where all drawing follows fixed rules and the only decision you make is which side to back. "Punto" means Player and "Banco" means Banker. It is not the same as Chemin de Fer or Baccarat Banque, where players deal and choose whether to draw. Read the guide

Push

A tie between you and the dealer — both on 19, say — which returns your stake with nothing won or lost. Roughly 8% of blackjack hands end this way. Certain variants, like "Push 22" in Blackjack Switch, deliberately turn some outcomes into pushes to pay for other player-friendly rules. Read the guide

Push (betting)

A bet that finishes level with the line — a −3 spread where the favourite wins by exactly three — and is refunded in full. Half-point lines exist for the express purpose of making pushes impossible. Read the guide

R

Racetrack

The oval betting panel you see on most live online roulette tables, laying the numbers out in wheel order instead of grid order. It turns call bets — voisins, tiers, orphelins, neighbours — into single clicks and lets you bet on physical sections of the wheel. Read the guide

Rake

The house's cut from each cash-game pot, usually 3–5% with a fixed ceiling per pot (around €3), or a slice of a tournament buy-in, normally 5–10%. Rake is why poker is beatable but never easy: a player with a thin edge turns into a loser once the rake is subtracted. Read the guide

Rakeback

Part of the rake handed back to you through a loyalty scheme, an affiliate arrangement or straight cashback. Rates of 20–40% are common and heavy volume can earn more. For a grinder paying €500 of rake a month, 30% rakeback is €150 — frequently the whole difference between a winning and a losing year. Read the guide

Re-buy / re-entry

Re-buy events let you top up chips during an early window if you bust or drop below a set stack; re-entry events let you sign up again from scratch after busting. Both swell prize pools and reward early aggression, but they can also multiply what the tournament ends up costing you. Read the guide

Reality check

The pop-up that breaks into play at set intervals, usually every 30 to 60 minutes, telling you how long you have been going and whether you are up or down, with a choice to carry on or quit. UKGC operators must offer it and it is standard in Sweden and Denmark. Simple, and genuinely effective against losing track of time. Read the guide

Reels

The vertical strips of symbols that spin in a slot. The old machines had three physical reels; video slots use five or six virtual ones and grid games go up to eight. Each reel runs on a symbol strip whose composition sets the odds of every combination the game can produce. Read the guide

Reg

Short for "regular": an experienced player putting in serious volume at a given stake, and usually doing it well. A table packed with regs holds little profit for anyone, which is why table selection is really about finding games with recreational players and few regs. Read the guide

Reload bonus

A deposit match aimed at existing customers, normally smaller than the welcome offer — 25–50% up to €100–€500 — and pinned to a particular day of the week. Wagering usually runs 20x–40x the bonus. Work out the effective cost (bonus × house edge × wagering) and compare it with the headline value before you opt in. Read the guide

Resolution

Settling a market's official result and paying $1 on every winning share. The criteria are written before trading opens and repay careful reading: "Will X happen by 31 December?" can turn on time zones, named sources and definitions. Anything contested goes to the oracle or the platform's rules committee. Read the guide

Respin

A feature that spins selected reels again while the others stay put, handed to you free after a near miss or sold for a price. Respins also drive hold-and-win rounds. The price of a paid respin is calculated to leave the game's RTP untouched, so there is no edge to be found in buying one. Read the guide

Responsible gambling

The habits and tools that keep gambling a form of paid entertainment instead of a source of harm: deposit and loss caps, time-outs, self-exclusion, reality checks and a route to help when it is needed. This is spending, never income — and the day it stops being enjoyable is the day to stop. Our responsible gambling page lists the helplines, including Nigerian support contacts. Read the guide

Risk of ruin

The odds of losing your entire bankroll, given your edge, your variance and your stake size. A poker player winning 5bb/100 with a standard deviation of 100bb/100 faces roughly a 1% risk of ruin on a 50-buy-in roll, but over 13% on 20 buy-ins. The cures are a bigger bankroll or smaller stakes. Read the guide

RNG (Random Number Generator)

The algorithm behind every outcome in online slots, RNG table games and virtual shuffles. Certified generators are put through independent lab testing for statistical randomness and unpredictability. The standard build is a pseudo-random generator seeded by hardware noise, with the game's maths model mapping each number onto a reel stop or a card. Read the guide

RTP (Return to Player)

The share of everything wagered that a game gives back to players over the long run. At 96% RTP a slot keeps €4 out of every €100 on average, though any single session can land miles either side of that. Studios frequently ship the same slot in several RTP versions and let the operator pick, so open the in-game info panel and check which one you are on. Read the guide

Rule of 2 and 4

The mental shortcut that turns outs into a percentage. Two cards still to come, on the flop, multiply your outs by 4; one card to come, on the turn, multiply by 2. Nine outs on the flop gives roughly 36% against a true 35%; on the turn it gives about 18% against a true 19.6%. Read the guide

S

Satellite

A qualifier that hands out seats in a larger event rather than cash. Ten players in a €10 satellite might play for one €100 seat. Strategy diverges from a normal MTT because every prize is identical: once the seats are nearly wrapped up, surviving is worth far more than piling up chips. Read the guide

Scatter symbol

A symbol that pays or fires a feature wherever it lands, with no need to sit on a payline. Three or more scatters normally opens the free-spins round. In a lot of games scatters are the only symbols that pay for simply appearing anywhere on the grid. Read the guide

Seed (provably fair)

The random ingredients behind a provably fair game. The server seed is hashed and published before you bet, the client seed is yours to set, and a nonce ticks up with each wager. Rotate the server seed and you can confirm every past result matched the hash that was committed. Change your client seed from time to time. Read the guide

Segregated funds

Player money held in bank accounts kept apart from the operator's working capital, so balances survive if the company goes under. MGA and UKGC licences require it and grade the protection as basic, medium or high. Unlicensed and Curaçao operators seldom segregate anything, which is a genuine counterparty risk on your balance. Read the guide

Self-exclusion

A ban you impose on yourself, binding on one operator or — through national schemes such as GamStop in the UK, Spelpaus in Sweden or ROFUS in Denmark — on every licensed operator in that country. Terms run from six months to permanent and cannot be cut short. Back it up with blocking software like Gamban, which also covers offshore sites. Read the guide

Session

One block of play with a clear beginning and end. Fixing a time limit, a loss limit and a stop-win before you start — and honouring all three — is bankroll management in its most usable form. Log the result of every session; the written record tells the truth far better than your memory does. Read the guide

Shares (Yes/No)

The two halves of a binary event contract. A Yes share returns $1 if the event occurs; a No share returns $1 if it does not. The two prices always add up to about $1, so buying No at $0.35 and selling Yes at $0.65 are the same position. Read the guide

Sharp / square

Sharps are professionals and strong bettors whose money actually moves the line; squares are recreational punters loading up on favourites, overs and famous clubs. Bookmakers roll out the carpet for square money and quietly limit the sharps. Tracking where sharp money went — reverse line movement — is a strategy in itself. Read the guide

Shoe

The box holding the multiple decks a dealer works through. Live online blackjack normally runs six or eight. Fewer decks help the player a little: single-deck S17 carries a house edge about 0.15% below the eight-deck game, which is exactly why single-deck tables so often claw it back with 6:5 blackjack payouts. Read the guide

Side bet (blackjack)

The optional extras offered next to your main hand — Perfect Pairs, 21+3, Lucky Ladies and friends. The multiples look tempting, but house edges run from 3% to 10% and beyond, something like ten times what the main game costs. Leave them alone unless you are purely there for fun and know the price. Read the guide

Sit & Go (SNG)

A one-table tournament that kicks off the moment enough players register, usually six or nine. Prizes normally go three deep at 50/30/20. Quick, tightly structured and heavy on ICM, SNGs are one of the best places to learn push-or-fold play properly. Read the guide

Slippage

The gap between the price you expected and the price you actually got, caused by your order eating through several levels of the book or shifting an AMM's curve. Big orders in thin markets suffer worst. Limit orders wipe slippage out entirely, at the risk of never being filled. Read the guide

Slot RTP versions

Studios routinely ship one slot with several RTP settings — 96.5%, 94.5% and 92.5%, say — and leave the choice to the operator. That spread is worth €2–€4 for every €100 you wager. Always open the info or paytable screen inside the casino you actually play at; the studio's own site only quotes the default. Read the guide

Small blind

The smaller forced bet, put in by the player immediately to the left of the button and usually half the big blind. It is the worst seat in poker, because you are first to act on every post-flop street. Defending far too wide from here is one of the most common and most expensive leaks in the game. Read the guide

Soft hand

Any hand where an ace is counting as 11, meaning the next card cannot bust you. Soft 18 — ace-seven — is the classic sticking point: basic strategy doubles it against 3 through 6, stands against 2, 7 and 8, and hits against 9, 10 and ace. Check any holding with our blackjack calculator. Read the guide

Source of funds (SOF)

The AML check where an operator asks you to prove where your gambling money came from — payslips, bank statements, tax filings or sale documents. Large cumulative deposits or a big win usually set it off. Refuse and your account stays frozen; supply clean paperwork and it is normally sorted within days. Read the guide

Source of wealth (SOW)

A heavier check than source of funds, asking how your overall wealth was built rather than where one deposit originated. It lands mainly on high-volume players and VIPs. Be ready with employment history, business accounts or inheritance records — operators face serious fines for waving it through. Read the guide

Speed baccarat

The live-dealer version that trims each round from roughly 48 seconds to 27 by dealing face up and dropping the squeeze. Rules and house edge are unchanged, but you play about 80% more hands per hour — and your expected loss per hour rises by the same proportion. Read the guide

Spin & Go

A three-handed hyper-turbo sit & go whose prize pool is drawn at random, anywhere from 2x to 10,000x the buy-in, spun before the first hand is dealt. The overwhelming majority land on 2x–3x, and the jackpot multipliers turn up less than once in 10,000 games. Play is push-or-fold from almost the first hand. Read the guide

Split

Breaking a pair into two hands, each backed by a bet the size of your original. Aces and eights always get split; tens and fives never do. Most tables let you re-split out to three or four hands but give a split ace only one card. Splitting correctly is worth about 0.4% of your return. Read the guide

Split bet

Two neighbouring numbers backed together, with the chip sitting on the line between them, paying 17:1. On a European wheel that is 2 chances in 37, or 5.4%. The edge stays at 2.7%, because the true odds are 17.5:1 while the table pays 17:1. Read the guide

Spread

The distance between the best bid and the best ask. A market showing 61¢ / 63¢ has a two-cent spread, which is a hidden 3% cost on a round trip. Spreads of one or two cents point to a liquid market; wide ones mean thin interest or genuine uncertainty about the outcome. Read the guide

Squeeze

The ritual of bending a baccarat card open slowly, traditionally performed by whoever has the biggest bet on the table. Online "Baccarat Squeeze" tables have the dealer do it for the camera. It builds tension and slows the game down — and given the house edge, slower is quietly in your favour. Read the guide

Stablecoin

Crypto pegged to a fiat currency, almost always the US dollar — USDT and USDC being the two you will meet. Stablecoins strip the price swings out of your gambling balance while keeping crypto's speed, which is why so many Nigerian players buy them P2P before depositing. They are the practical deposit currency at crypto casinos and the settlement asset on most on-chain prediction markets. Read the guide

Stake (betting)

What you put at risk on a bet. Disciplined bettors keep it to a fixed slice of bankroll, 1–3% a bet, or size by edge with a fractional Kelly calculation — never by betting bigger after a loss. A flat one-unit stake is the simplest staking plan that actually works. Read the guide

Stake (slots)

The amount riding on each spin: coin value × coins per line × active lines, or in modern games one combined total bet. Typical ranges run from €0.10 up to €100. What decides how long you last is your stake measured against your bankroll, not the game's RTP. Read the guide

Steam move

A sharp, simultaneous shift in odds across a swathe of bookmakers, generally triggered by heavy money from syndicates or sharp groups. "Chasing steam" means grabbing the same side at the books that have not moved yet. It pays only if you genuinely are quicker than the market. Read the guide

Sticky bonus

A bonus mixed into your deposit that can only ever be wagered, never withdrawn — cash out and the bonus amount is subtracted from your balance. Some sites call it a play-only bonus. Because it inflates the total you have to turn over, it is worse for you than a non-sticky bonus of identical size. Read the guide

Sticky wild

A wild that locks into position for several spins or for the remainder of a bonus round, lifting your chances on every spin that follows. You will also see them called locked or frozen wilds. They matter most in free spins, where a growing collection of sticky wilds is what produces the biggest payouts. Read the guide

Stop-loss

A loss limit fixed in advance, at which you close the session whatever your gut is telling you. The usual guidance is 10–20% of your total bankroll, or two to three buy-ins in poker. It does not alter expected value one bit, but it does stop the tilted, oversized bets that turn a routine losing night into a disaster. Read the guide

Stop-win

A profit target agreed beforehand, at which you bank the money and walk. In a negative-expectation game it cannot improve your EV, yet it earns its keep behaviourally: it defeats the house money effect and makes sure at least some sessions finish with cash still in your pocket. Read the guide

Straight up

One number, paying 35:1. Your chance is 1 in 37 on a European wheel, so 2.7%, and 1 in 38 on an American one, so 2.63%. True odds are 36:1, which means the house pockets one unit in every 37 — the 2.7% edge the whole game is built on. Read the guide

Street bet

Three numbers in a horizontal row — 7, 8, 9 for example — backed by placing the chip at the end of the row, paying 11:1. Dealers also call it a row or a trio. On a European wheel that is 3 chances in 37, or 8.1%. Read the guide

Sunk cost fallacy

Playing on because of what you have already put in — "I've fed €300 into this machine, I can't stop now." That €300 is gone whatever you do next, and the only thing that counts is the expected value of the very next bet, which is negative. Get up and leave. Read the guide

Super 6

Either an alternative name for no-commission baccarat, or the side bet that Banker wins with a total of six, paying between 12:1 and 15:1. Depending on the payout, that side bet's house edge runs from 13% to 29% — putting it among the very worst bets available anywhere in the casino. Read the guide

T

Terms and conditions

The legal agreement between you and the operator. The clauses worth your attention are bonus wagering and max bet rules, withdrawal caps, dormant-account charges, the restricted-countries list — check whether Nigeria appears on it — and any right to void winnings for "irregular play". A clause letting the operator seize deposits for any reason at all is a blacklist-grade warning. Read the guide

Third-card rule

Baccarat's fixed drawing schedule. Player draws on 0–5 and stands on 6–7. Banker always draws on 0–2, draws on 3–6 depending on the Player's third card, and stands on 7. A natural of 8 or 9 ends the drawing immediately. Our baccarat calculator applies the rules to any shoe size. Read the guide

Tie bet

Backing Player and Banker to finish on the same total, normally paid at 8:1. The genuine probability is 9.52%, which leaves a house edge of 14.36% at 8:1 and 4.85% at the rarer 9:1. Of the three main baccarat bets it is comfortably the worst. Read the guide

Tiers du cylindre

The call bet covering the twelve numbers facing zero across the wheel — 27 through to 33 in wheel order. Six chips buy six splits (5/8, 10/11, 13/16, 23/24, 27/30, 33/36) and cover 32.4% of the wheel. A hit pays 17:1 on the winning split, so you collect 12 chips net. Read the guide

Tilt

Playing on emotion instead of strategy, usually straight after a bad beat or a heavy loss — calling far too wide, bluffing at everything, jumping up in stakes to get level. For most players tilt burns more money than any technical weakness ever will. The cure is a stop-loss and a walk outside. Read the guide

Time-out

A short break you impose on yourself at one operator, usually 24 hours to six weeks, during which you cannot log in or fund the account. Unlike self-exclusion it lifts on its own. It is worth using after any big loss or big win, the moments when judgement is least reliable. Read the guide

Transaction hash (TXID)

The unique fingerprint of a blockchain transaction. Casinos show it when they pay you; drop it into a block explorer such as mempool.space, etherscan.io or tronscan.org to confirm the transfer went out and count its confirmations. Save it — it is your evidence if a dispute ever starts. Read the guide

True count

The running count divided by however many decks you estimate are still in the shoe. Running count +6 with three decks left is a true count of +2. It is the true count that sets your actual edge and your bet size, because +6 means a great deal more with one deck left than with five. Read the guide

U

UKGC (UK Gambling Commission)

The body regulating all gambling offered to customers in Great Britain under the Gambling Act 2005, and the strictest consumer regime in the industry: affordability checks, no reverse withdrawals, compulsory GamStop integration, the £2–£5 online slot stake cap brought in during 2025 and heavy fines for AML failings. Read the guide

UMA

The decentralised "optimistic oracle" protocol Polymarket and others lean on to settle markets. Someone proposes an outcome and posts a bond; if no one disputes it inside the window, typically two hours, it becomes final. Disputes go to a vote of UMA token holders, and resolutions have turned contentious whenever the market's wording was loose. Read the guide

Under the gun (UTG)

First to act before the flop, sitting immediately to the left of the big blind. With the entire table still to speak, UTG needs the tightest opening range at the table — somewhere around 12–15% of hands nine-handed — because every player left to act has position on you. Read the guide

Unit

Your standard bet, defined as a fixed share of bankroll — usually 1–2% for sports betting, and one big blind or one buy-in in poker. Recording results in units rather than naira or euros keeps performance comparable across stakes and stops your bet sizing drifting as the bankroll moves. Read the guide

Upcard

The dealer's face-up card, and the single most important piece of information basic strategy uses. Against 2 through 6 — the bust cards — you play conservatively and double or split freely; against 7 through ace you have to hit your stiff hands. Showing a 5 or 6, the dealer busts about 42% of the time. Read the guide

USDC

USD Coin, the dollar stablecoin issued by Circle, backed fully by cash and short-dated US Treasuries with monthly reserve attestations. It is the native settlement currency on Polymarket (via Polygon) and is widely taken at crypto casinos. It also falls under the EU's MiCA framework. Read the guide

USDT

Tether, the biggest dollar stablecoin by market capitalisation and the deposit currency you will see most often at crypto casinos — and the one most commonly bought on Nigerian P2P desks. It runs on several networks, with TRC-20 (Tron) preferred for fees close to zero. Confirm which network the casino supports first: ERC-20 and TRC-20 addresses cannot be used interchangeably. Read the guide

V

Value bet

Betting a hand you think is ahead, sized so that worse hands will still call. The skill lies in thin value — firing a medium-strength hand that beats an opponent's calling range slightly more than half the time. It is value betting, not bluffing, that produces most of the profit in poker. Read the guide

Value bet (sports)

A bet where the price implies a smaller chance than you honestly believe the outcome has. Rate a team at 50% while the book offers 2.20, implying 45.5%, and you are holding 10% of positive expected value. Finding that gap repeatedly is the only genuine long-term edge in sports betting. Read the guide

Variance

How widely results scatter around their expected value — in plain terms, how violently your bankroll swings. High-variance games pay seldom but heavily; low-variance games pay often but small. Two slots with the same 96% RTP can feel like completely different games purely because of variance. Read the guide

Vig / juice

The bookmaker's commission baked into the price, also called the margin or overround. On a standard US spread priced at −110 on both sides you risk $110 to win $100, and that $10 gap is the vig — 4.55% of everything staked into the market. Read the guide

VIP programme

The invitation-only layer sitting above the public loyalty scheme: a personal account manager, raised limits, tailored bonuses, priority withdrawals and gifts. It exists because a small slice of players produces most of the revenue. Regulators now watch these schemes closely for encouraging harm, and the UKGC requires affordability checks on every VIP. Read the guide

Voisins du zéro

The "neighbours of zero" call bet, taking in 17 numbers running from 22 round to 25 in wheel order, zero included. Nine chips cover it: two on the 0/2/3 street, two on the 25/26/28/29 corner and one apiece on five splits. That is 45.9% of a European wheel. Read the guide

Volatility

A game's risk profile — how often it pays and how much it pays when it does. Low-volatility slots land small wins of 1x–10x regularly; high-volatility titles can run past 100 spins with nothing meaningful and then return 1,000x or more. Most studios print a volatility rating, on a 1–5 or low/medium/high scale, in the game info. Read the guide

W

Wagering requirement

How many times over a bonus — or bonus plus deposit — has to be staked before any winnings can be withdrawn. A €100 bonus at 35x means €3,500 of qualifying bets. The expected cost is roughly wagering × bonus × house edge, so €3,500 × 4% = €140 on a 96% slot: more than the bonus you were given. Read the guide

Wallet address

The public string crypto is sent to, functioning much like an account number. Addresses belong to a specific network: Bitcoin addresses begin with 1, 3 or bc1, Ethereum addresses with 0x. Always copy and paste, then check the first and last characters by eye — clipboard malware quietly swapping addresses is a real and common theft. Read the guide

Ways to win

A payout structure that counts matching symbols on adjacent reels from the left wherever they sit, instead of along fixed paylines. A 5×3 grid produces 243 ways (3^5), a 5×4 grid gives 1,024, and Megaways stretches to 117,649. You stake one flat amount per spin rather than paying per line. Read the guide

Welcome bonus

The offer dangled at new customers, typically a deposit match — 100% up to €200 is the common shape — plus a batch of free spins. What it is actually worth depends on wagering, game weighting, max bet and expiry, not the big number on the banner. A 50% match at 20x frequently beats a 200% match at 50x. Read the guide

Wild symbol

The joker of the reels: a symbol that stands in for any ordinary symbol to complete a win. The variants include expanding wilds that fill a reel, walking wilds that shift one reel per spin, stacked wilds and multiplier wilds. As a rule they will not substitute for scatter or bonus symbols. Read the guide

Win rate

How profitable you actually are over time: big blinds per 100 hands in cash poker, ROI in tournaments, or yield — profit divided by turnover — in sports betting. 5bb/100, a 20% MTT ROI or a 5% sports yield are all strong numbers. Sample size decides everything, though: it takes tens of thousands of hands or thousands of bets before a win rate means anything. Read the guide

Withdrawal limit

The ceiling on what an operator will pay out in a day, a week or a month — €5,000 daily or €20,000 monthly, for instance. Very large jackpot wins are often paid in instalments. Tight limits are a serious problem if you ever land a big score, so weigh them up in our online casino comparison. Read the guide