Slapjack

Deal the entire deck evenly among all players, face down in individual piles.

Each player takes turns flipping the top card of their pile into a shared central pile.

The instant a Jack appears on top of the central pile, all players race to slap it first.

The player who slaps the Jack first collects the entire central pile and adds it to the bottom of their own pile.

A player who slaps a non-Jack card by mistake must give one card to the player whose card was on top; the game continues until one player collects every card.