joker

Meaning

Noun

• A person who makes jokes.
• A funny person.
• A jester.
• A playing card that features a picture of a joker (that is, a jester) and that may be used as a wild card in some card games.
• An unspecified, vaguely disreputable person.
• A man.
• A clause in a contract that undermines its apparent provisions.
• A friendly unit that acts as a suspected hostile unit in a military excercise.

Origin

• joke + -er, but in the sense of a playing card possibly by alteration of Jucker, also the origin of the name of the card game euchre.