What is Deck Change?
1.
Wrapping a towel around oneself to change (typically into or out of a bathing suit) in a public setting.
The "deck" is the walking surface around a swimming pool.
Kyle was in the middle of a hurried deck change when he was
pants ed. Hilarity ensued.
See
2.
In a card game, to bring in a new deck of cards, often by calling out "Deck change!" Some players do this for good luck.
Nobody was very lucky, so everyone called for a deck change.
See