English

Definition of frat boy noun from the Oxford Advanced Learner's Dictionary

 

frat boy

 noun
noun
BrE BrE//ˈfræt bɔɪ//
 
; NAmE NAmE//ˈfræt bɔɪ//
 
(North American English, informal)
 
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a young man who behaves in a loud or stupid way, considered typical of members of some college fraternities (= clubs for male college students in the US) a teen comedy about a group of party-loving frat boys in 1950s Florida frat-boy humour