Ice
Ice is slang for a cold deck, a deck in which the cards have been arranged secretly by a cheater.
The simple explanation
Ice is another word for a cold deck. A player who says 'the deck is on ice' suspects that the deck was switched.
A closer look
A cold deck is swapped into the game so that a chosen player gets a strong hand. Honest rooms prevent it with new decks, shuffling machines and cameras. If you suspect a cold deck, tell the floor. Do not confuse this with a cooler, which is just a hand that loses to a stronger one by bad luck.
A practical example
A player suspects that the deck was switched and calls the floorman, who replaces the deck.
Full explanation
Ice is slang for a cold deck, a deck in which the cards have been arranged secretly by a cheater.
Ice is slang for a cold deck.
A cold deck is arranged by a cheater.
Rooms prevent it with sealed decks and cameras.
Do not confuse it with a cooler.