While all remaining players have the option to show their cards, in many cases players with losing hands will choose to simply toss their cards away without revealing them (known as mucking ) if they see that a stronger hand has already been shown.
Poker. In poker, it most often refers to the discard pile into which players may throw their folded hands, and into which the dealer places burned cards. It also refers to when a player is folding his hand (face down) without saying anything.