Marker: An IOU. Once a player has established credit with the house, they can use a marker to get more chips while on the casino floor.

Mechanic: A cheating dealer.

Mop: Another name for the stick used to retrieve the dice on a craps table.

Nut: Overhead costs of running a casino. May also refer to the amount a gambler decides to win during a session. In poker, "the nuts" is the best hand.

On tilt: When a player, usually in cards, overreacts to a bad hand by betting erratically on hands that follow.