The term 'Wild Card in Poker' refers to the JOKER card, which is a special card that can be used as any card in the deck. It is usually used to complete a flush or straight, and can also be used as an Ace. The JOKER card is not part of the standard 52-card deck, but is often included in some variations of poker. The Wild Card in Poker is a powerful tool that can be used to gain an advantage over other players.