Jagging
Jagging is a cheater's technique of marking cards with a fingernail or a device. The marks let the cheater recognize cards from the back.
The simple explanation
A person who marks cards makes a small scratch or bend that other players cannot easily see. Later he reads the marks to know which cards are which.
A closer look
Marking cards is a form of cheating and is illegal in casinos. In a legitimate room, new decks are used often, and dealers check the decks for damage. If you see marks on the back of cards, you should call the floor immediately and ask for a new deck. Related words are indexing and marked cards.
A practical example
A player sees a small scratch on the back of several high cards and calls the floorman, who replaces the deck.
Full explanation
Jagging is a cheater’s technique of marking cards with a fingernail or a device. The marks let the cheater recognize cards from the back.
Jagging is marking cards with a fingernail or a device.
It is a type of cheating.
If you find marked cards, call the floor.
It is related to indexing.