Definition of schmuck noun from the Oxford Advanced Learner's Dictionary

 

schmuck

 noun
noun
BrE BrE//ʃmʌk//
 
; NAmE NAmE//ʃmʌk//
 
(informal, disapproving, especially North American English) Stupid
 
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a stupid person He's such a schmuck! See related entries: Stupid Word Origin late 19th cent.: from Yiddish shmok ‘penis’.
See the Oxford Advanced American Dictionary entry: schmuck