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Casino Glossary: 40 Terms, No Jargon

From “bonus buy” to “wagering”, every term you will meet, explained in one sentence.

IVInès VargaProbability & maths · Updated October 2026

Key takeaways

  • Learn RTP, volatility and wagering first
  • KYC is an identity check required by law
  • Provably fair means verifiable, not more generous

Money and bonuses

The words that decide how much you keep.

  • Wagering requirement: how many times bonus money must be bet before it can be withdrawn
  • Max bet: the highest stake allowed while a bonus is active
  • Cashback: a percentage of net losses returned
  • Sticky bonus: a bonus that can be played but never withdrawn
  • KYC: “know your customer”, the identity check before withdrawals

Games

The words on every game screen.

  • RTP: share of stakes returned to players over the long run
  • Volatility: how large and how frequent wins are
  • Hit frequency: share of spins that return anything
  • Bonus buy: paying a fixed price to trigger the bonus round
  • Progressive jackpot: a prize pool fed by every stake on a network

Fairness and safety

The words that protect you.

  • RNG: random number generator, tested by independent labs
  • Provably fair: results you can verify with hashes and seeds
  • Self-exclusion: blocking yourself from a casino for a set period
  • Reality check: a reminder of how long you have been playing

18+ Gambling should stay entertainment. Free, confidential help is available if it stops being fun.

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