The world of bonus buy slots comes with its own vocabulary that can be confusing for newcomers. Whether you are reading game reviews, watching slot streams, or talking to other players, understanding these terms will help you navigate the bonus buy slot landscape with confidence.
Core Bonus Buy Terms
Bonus Buy / Feature Buy / Feature Drop: The mechanic that lets you pay a premium to instantly trigger the bonus round instead of waiting for it to happen through regular play. Different providers use different names, but they all refer to the same concept.
Ante Bet: A feature offered by some providers (notably Pragmatic Play) that increases your base bet by 25% in exchange for doubling the probability of triggering the bonus naturally. It is a middle ground between regular play and buying the bonus outright.
Buy-In Cost: The price of purchasing the bonus feature, expressed as a multiplier of your base bet. For example, a 100x buy-in on a $1 bet costs $100.
Bonus Round Mechanics
Tumble / Cascade / Avalanche: A mechanic where winning symbols are removed from the reels and replaced by new symbols falling from above. This can create chain reactions of multiple wins from a single spin. Different providers use different names for what is essentially the same mechanic.
Sticky Wilds: Wild symbols that remain in place for the duration of the bonus round (or for a set number of spins), increasing your chances of forming winning combinations on subsequent spins.
Multiplier: A value that multiplies your win by a certain amount. Progressive multipliers increase after each winning cascade, while random multipliers appear on specific symbols or positions. Some games feature multipliers that can combine or stack for enormous payouts.
Retrigger: When additional free spins are awarded during an existing free spins round, extending the bonus. Some games have unlimited retriggers, while others cap the maximum number of spins.
Statistical Terms
RTP (Return to Player): The theoretical percentage of all wagered money that a slot returns to players over time. A 96% RTP means the game is expected to return $96 for every $100 wagered in the long run.
Volatility / Variance: A measure of how risky a slot is. High-volatility games pay less frequently but with larger amounts. Low-volatility games pay more often but in smaller amounts. Most bonus buy slots are medium-high to extremely high volatility.
Hit Rate: How often a game produces a winning spin, expressed as a ratio. A hit rate of 1 in 3 means roughly one out of every three spins results in some kind of win. This applies mainly to base game play.
Max Win: The highest possible payout from a single spin or bonus round, expressed as a multiplier of the base bet. When a max win is hit, the game caps the payout at this amount regardless of what the symbols would otherwise have paid.
Streamer and Community Terms
Dead Spin: A free spin during a bonus round that produces no win at all. Multiple dead spins in a row can quickly turn a promising bonus round into a disappointing one.
Full Screen: When every position on the reels is filled with the same high-paying symbol, resulting in a massive win. This is extremely rare and usually the basis for the game's maximum win potential.
Busted / Whiffed: Slang for when a bonus round returns significantly less than the buy-in cost. For example, buying a bonus for 100x and getting back only 10x would be considered a bust.
Printing: Slang for when a bonus round is delivering a huge payout, as in "the slot is printing money." Used during exciting moments on streams and in community discussions.
