The
Joker is a
playing card found in most modern card decks, as an addition to the standard four
suits (clubs, diamonds, hearts and spades). Originating in the United States during its
civil war, the card is unique in that it lacks an industry-wide standard appearance. Created as a
trump card for
Euchre, it has since been adopted into many other
card games where it may function as a
wild card.