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joker

noun [C] (ANNOYING PERSON)
 
 
/ˈdəʊ.kər/ US  /ˈdʒoʊ.kɚ/ informal

Definition

a person who has done something that annoys you: Some joker keeps setting off the fire alarm.Stupid and silly people
(Definition of joker noun (ANNOYING PERSON) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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