Glossary
Casino & Gambling Glossary
40 plain-English definitions of every term you'll encounter - RTP, house edge, wagering requirements, GAMSTOP, KYC, provably fair and the rest.
A
- AGCO
- Alcohol and Gaming Commission of Ontario - the regulator for online gambling in Ontario, Canada. The first fully licensed iGaming market in North America outside the US.
- AMS
- Account Management System - internal casino software handling player accounts, KYC, deposits, withdrawals and bonus tracking.
B
- Bankroll
- The total amount of money set aside for gambling, separate from living expenses. Good practice is to bet 1-5% of bankroll per session.
- BetBlocker
- Free, global self-exclusion app that blocks gambling sites on a device for a user-set period. Works alongside or independently of national schemes. Full guide →
- Bonus Abuse
- Behaviour casinos define as exploiting bonus terms - opening multiple accounts, depositing only to claim a bonus, or using restricted strategies. Voids winnings and triggers account closure.
C
- Cashback
- A percentage of net losses returned to the player, usually weekly or monthly. The most genuinely valuable bonus type because there is no wagering requirement on the cashback itself at most operators.
- Cooling-Off Period
- A short break from a casino account (typically 24 hours to 6 weeks) that blocks deposits but does not formally self-exclude. Reversible on request after the period ends.
- Curaçao Licence
- Offshore gambling licence issued by the government of Curaçao. Lower consumer-protection requirements than UKGC or MGA - common in crypto-first and global casinos.
D
- DGE
- Division of Gaming Enforcement (New Jersey) - the state regulator for licensed online casinos serving NJ residents.
E
- Expected Value (EV)
- The statistically expected long-run outcome of a bet or session, calculated as (probability × payoff) summed across all possible outcomes. House-edge games carry negative EV; cleared no-wagering bonuses can carry positive EV. Full guide →
F
- Free Spins
- A bonus type giving the player a fixed number of slot spins at a set bet size, on specific games. Winnings are usually subject to wagering - or paid as cash on no-wagering offers.
G
- GAMSTOP
- UK national self-exclusion scheme. Once registered, players are blocked from every UKGC-licensed online operator for 6 months, 1 year or 5 years. Free and reversible only after the chosen period ends. Full guide →
- Game Contribution
- The percentage of bets on a given game that counts toward wagering requirements. Slots typically count 100%; blackjack and roulette often 10% or 0%.
- GameSense
- Responsible gambling programme used in several Canadian provinces (British Columbia, Manitoba) and at MGM properties in the US. Full guide →
- GCB
- Gaming Control Board - state regulator for licensed online casinos. Most commonly used as PA GCB (Pennsylvania) or NGCB (Nevada).
H
- House Edge
- The mathematical advantage the casino has on a bet, expressed as a percentage of the wager. Equal to 100% minus RTP. Blackjack with basic strategy ≈ 0.5%; American roulette ≈ 5.26%; slots ≈ 3-6%.
I
- IBAS
- Independent Betting Adjudication Service - the dispute resolution body UKGC-licensed operators must submit to. Final binding decisions for player vs operator disputes.
K
- KYC
- Know Your Customer - identity verification required by regulators. Typically a government ID plus a proof-of-address document. Triggered at signup at UKGC casinos; at withdrawal thresholds at most crypto casinos.
L
- Live Dealer
- Real human dealers operating physical cards or wheels in a studio, streamed to players in HD. Evolution, Pragmatic Live and Playtech run the three major networks. House edge identical to RNG equivalents.
M
- Martingale
- Betting system that doubles the wager after every loss, intending to recover prior losses on the next win. Mathematically broken - table limits and bankroll constraints make ruin certain in long enough play.
- Max Cashout
- A cap on how much a player can withdraw from a bonus, regardless of how much is won. Common on free-spin and no-deposit bonuses. Caps below £100 should be considered marketing, not value.
- MGA
- Malta Gaming Authority - tier-1 European gambling regulator. Mandatory player-fund segregation, independent dispute resolution, annual financial audit.
- MGCB
- Michigan Gaming Control Board - state regulator for Michigan-licensed online casinos.
- Min Deposit
- The smallest amount a casino will accept as a first deposit. Industry standard is £10; some operators go down to £1 or £5.
N
- No-Deposit Bonus
- A bonus credited without requiring a player deposit. Usually small (£5-£20 cash or 10-50 free spins) with strict wagering and a low max cashout cap.
O
- OASIS
- Germany's national self-exclusion scheme, operated by the Regional Council of Darmstadt. Blocks self-excluded players across all state-licensed German operators. Full guide →
P
- Pokies
- Australian and New Zealand term for slot machines or video slots. Functionally identical to slots elsewhere.
- Progressive Jackpot
- A jackpot that grows with every losing bet on a linked slot or network of slots until it is won. Mega Moolah, Mega Fortune and Divine Fortune carry seven-figure jackpots.
- Provably Fair
- A cryptographic method (typically SHA-256) used by crypto casinos to let players verify game outcomes were genuinely random. Server seed is published hashed before each round; player can verify post-hoc.
R
- RNG
- Random Number Generator - the algorithm producing game outcomes at non-live casino games. Audited by independent test houses (eCOGRA, iTech Labs, BMM Testlabs) at every licensed operator.
- RTP
- Return To Player - the long-run percentage of wagered money paid back to players. A 96% RTP slot returns roughly £96 per £100 wagered over millions of spins. Equal to 100% minus house edge. Full guide →
S
- Self-Exclusion
- Voluntarily blocking yourself from gambling for a set period. Available at the operator level (per-casino), national level (GAMSTOP UK, OASIS Germany, Spelpaus Sweden) and device level (BetBlocker app). Full guide →
- Side Bet
- An optional secondary wager on a table game (Perfect Pairs, 21+3 on blackjack; Lucky 6 on baccarat). Always carries a higher house edge than the base game - entertainment, not value.
- Spelpaus
- Sweden's national self-exclusion register. Blocks self-excluded players across all Spelinspektionen-licensed operators serving Sweden. Full guide →
T
- Time-Out
- A short, reversible break from a casino account (often 24 hours to 6 weeks). Less serious than self-exclusion - designed for cooling off, not stopping completely.
U
- UKGC
- UK Gambling Commission - the strictest gambling regulator in the world. Mandatory GAMSTOP, IBAS dispute resolution, affordability checks, segregated player funds, full T&C disclosure. Full guide →
V
- Variance
- How widely outcomes deviate from the average. High-variance slots produce rare big wins and frequent small losses; low-variance slots produce frequent small wins. Same RTP, different feel.
- VIP Programme
- Casino loyalty scheme offering personalised bonuses, cashback, faster withdrawals and a dedicated account manager to high-stake players. Invitation-only at most operators.
W
- Wagering Requirement
- How many times a bonus (or bonus + deposit) must be wagered before winnings become withdrawable. Industry standard is 30-40x bonus; below 25x is genuinely good, above 50x is very difficult to clear.
- Wild / Scatter
- Slot symbols - Wild substitutes for any other symbol to complete a winning line; Scatter pays out regardless of line position and often triggers bonus features.
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