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

     

    goof

     noun
    noun
    BrE BrE//ɡuːf//
     
    ; NAmE NAmE//ɡuːf//
     
    (informal, especially North American English)
     
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  1. 1a stupid mistake
  2. 2a silly or stupid person
  3. Word Origin early 20th cent.: of unknown origin.
See the Oxford Advanced American Dictionary entry: goof