To place a distinguishing feature on the back of a playing card, especially for the purpose of identifying that card at a later point in the game.
EXAMPLE: "Casinos change decks regularly as a security precaution against cheaters who might mark the cards."
APPLIES TO: Land-based Venues
RELATED TERMS: Cosmetics
Any feature on the back of a playing card that distinguishes it from other cards in the deck.
EXAMPLE: "I noticed a mark on one of the cards, and then started watching more carefully to try and detect who was cheating."
RELATED TERMS: Cosmetics, Daub
The target of a cheater or of a highly-skilled player; sucker.
EXAMPLE: "If you can't spot the mark at the table, it's you."
APPLIES TO: Online and Land-based Venues
SYNONYMS: Fish, Live One