joker Meaning, definition in Cambridge English Dictionary
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Meaning of "joker" - English Dictionary

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jokernoun [C]

uk   /ˈdəʊ.kər/  us   /ˈdʒoʊ.kɚ/

joker noun [C] (CARD)

a special playing card that can be given any value and is used in some card games instead of any other card

joker noun [C] (FUNNY PERSON)

someone who likes telling funny stories or doing stupid things in order to make people laugh: He's always been a joker and can't resist playing tricks on people.

joker noun [C] (ANNOYING PERSON)

informal a person who has done something that annoys you: Some joker keeps setting off the fire alarm.
(Definition of joker from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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