Definition of goofy adjective from the Oxford Advanced Learner's Dictionary

 

goofy

 adjective
adjective
BrE BrE//ˈɡuːfi//
 
; NAmE NAmE//ˈɡuːfi//
 
(informal, especially North American English) Stupid
 
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silly; stupid a goofy grin See related entries: Stupid
See the Oxford Advanced American Dictionary entry: goofy