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

 

duffer

 noun
noun
BrE BrE//ˈdʌfə(r)//
 
; NAmE NAmE//ˈdʌfər//
 
(British English, informal)
 
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a person who is stupid or unable to do anything well I was a bit of a duffer at school. Word Origin mid 19th cent.: from Scots dowfart ‘stupid person’, from douf ‘spiritless’.