Kansas City Lowball: a form of poker where the worst hand possible, (A,2,3,4,5) is the best hand.
Keep Them Honest: when you call at the end of a game, this does not allow anyone to get away with a bluff.
Key Card: the card that makes your hand such a good one.
Key Hand: the hand that during a tournament was very important.
Kicker: the highest card in a hand that has no use, example: 2 pair and an 8 kicker.
Kick It: to raise.
Kill Pot: when a pot winner is trying to force action in the game.
Knock: when a player checks.
Kojak: a hand containing a King and a Jack.