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

 

pillock

 noun
noun
BrE BrE//ˈpɪlək//
 
; NAmE NAmE//ˈpɪlək//
 
(British English, slang)
 
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a stupid person Word Origin mid 16th cent.: variant of archaic pillicock ‘penis’, the early sense of pillock in northern English.