"That's poker" is a colloquial expression often used to convey acceptance of a situation that is out of one's control. It's derived from the game of poker, where luck and chance play a significant role in the outcome. Essentially, it means "that's just how things are" or "that's life."

Rummy. Poker. About. Rummy is a matching card game where players need to form sets based on matching cards of the same rank or sequence and the same suit. Poker is a card game where players place wagers based on different hand strengths.