Rap ( poker )

1) In draw poker, at the time to draw cards, indicate that one is pat. So called because a player, if he has a pat hand, often raps on the table with his knuckles when it is his turn to announce his draw.
2) In any form of poker, at the time for making a bet, indicate that one declines to bet; check.
3) In a game in which gypsy bets are permitted, when it is the blind's turn to act, decline to raise, indicated by rapping on the table with one's cards or knuckles.
4) In a game in which a player must post a blind to get a hand earlier than waiting for the blind to come around (which blind then acts as the player's opening bet), when it is that player's legal turn to act, decline to raise, indicated in similar fashion.
5) When one is offered the deck by the dealer, after shuffling, to cut, rap on the deck to indicate one is declining the option of cutting the cards. For definitions 1 and 2, also knuckle or knock. For 5, sometimes, tap.
6) Standing pat. "He gave it the rap" means he stood pat.