Bad Beat
A 'Bad Beat' occurs when a hand that is favorite to win is beaten by a lucky draw.

Generally, this only applies when the favorite to win is far ahead of the other hand. Such as a pocket pair of Aces hittin a full house on the flop, but being beaten by a player with a pair of twos who gets a two on the turn and the river to make a poker, or quads. That would be a particularly Bad Beat!

Many players consider any favorite hand that gets beaten by an underdog to be a Bad Beat, but that's just poker.

Some online poker rooms offer a Bad Beat Jackpot, which can take the sting out of a really bad Bad Beat.