Definition from Wiktionary, the free dictionary
From the metaphor that the deck (of cards) is cold, in the sense "heartless, emotionless"
- (poker) A hand where two or more players have very strong hands and one or more of them loses a lot of chips despite the strength of the hand(s) involved.
- (nonstandard) To inflict a cold deck situation on an opponent.
- Almost always used in the passive voice to be cold decked.