Big bet.

About Big bet

A big bet (BB) is the larger of two fixed bet amounts in a fixed-limit poker game. Big bets are generally double the wager of the initial or small bet, and are used in the latter betting rounds of hands. In these games the small bet applies to the earlier rounds and the big bet to the later ones, and the two limits are written as a pair, so that a game with a $2 small bet and a $4 big bet is described as a "$2/$4" game. Any multi-round poker game can use big bets to standardize wagers while maintaining a sufficient risk-ratio to encourage bluffing. Casino poker tables use big bets to set a limit to the amount of money a patron can lose in each wager. The fixed big bet of limit play is distinct from big-bet poker, a broader term for no-limit and pot-limit formats in which wagers are large relative to the pot rather than capped at a set amount.