joker

/ˈdʒoʊkər/

/ˈdʒʌʊkə/

Other forms: jokers

A joker is someone who loves jokes, and tells them all the time. Jokers are usually harmless, unless you meet up with Batman's archenemy, "The Joker." He's no joke.

A joke-teller or practical joke-player is one kind of joker, but you can also use this word when you're annoyed with someone who's acting ridiculous or foolish: "That joker in the convertible just ran a red light!" Card players might be more familiar with the jokers you find in a full deck, the extra cards that are either used as wild cards or removed when you play a game.

Definitions of joker

1. noun

   a person who enjoys telling or playing jokes
   synonyms: jokester

   type of:

   comedian, comic

   a professional performer who tells jokes and performs comical acts
2. noun

   a person who does something thoughtless or annoying
   “some joker is blocking the driveway”

   synonyms: turkey

   type of:

   disagreeable person, unpleasant person

   a person who is not pleasant or agreeable
3. noun

   a playing card that is usually printed with a picture of a jester
   type of:

   playing card

   one of a pack of cards that are used to play card games
4. noun

   an inconspicuous clause in a document or bill that affects its meaning in a way that is not immediately apparent
   “when I demanded my money he showed me the joker in the contract”

   type of:

   article, clause

   a separate section of a legal document (as a statute or contract or will)