Camouflage - Anything a skilled gambler does to conceal their activities from the casino. Camouflage can include mixing in playing and betting behavior that mimics typical gamblers, or using disguises, appearing to be drunk, or any number of other possible ploys intended to throw the casino's scrutiny off.
Negative Expectation - The long-run disadvantage or loss of a given situation without reference to any particular outcome; that is, what you figure to lose on average after a considerable time of play, or after a large number of repetitions of the same situation.
Outside Bets - Roulette bets located on the outside part of the layout. They involve betting 12 or 18 numbers with one chip.
Rated - Determination by the casino that a player's skill level is above average or on a professional level. A player's rating may be stored on computer and referred to the pit.
Session - A period of play or a table sitting at any gambling game.
Sharker, Sharper, or Cardsharp - A cheater.