English

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

 

plonker

 noun
noun
BrE BrE//ˈplɒŋkə(r)//
 
; NAmE NAmE//ˈplɑːŋkər//
 
(British English, slang) Stupid
 
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a stupid person You’re a right plonker. See related entries: Stupid Word Origin mid 19th cent. (as a dialect word meaning ‘something large of its kind’): from the verb plonk + -er.