The crossword solution for the term 'Joker, e.g.' is CARD, which is a four-letter word. The Joker is a playing CARD found in many traditional decks of cards. It is typically the highest-ranking CARD and is often used as a wild CARD in many CARD games. It is also sometimes referred to as the 'Best Bower' or 'FOOL'. The Joker is usually depicted as a jester or court jester, and is often used as a humorous addition to a deck of cards.