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

 

goof

 verb
verb
BrE BrE//ɡuːf//
 
; NAmE NAmE//ɡuːf//
 
Verb Forms present simple I / you / we / they goof
BrE BrE//ɡuːf//
 
; NAmE NAmE//ɡuːf//
 
he / she / it goofs
BrE BrE//ɡuːfs//
 
; NAmE NAmE//ɡuːfs//
 
past simple goofed
BrE BrE//ɡuːft//
 
; NAmE NAmE//ɡuːft//
 
past participle goofed
BrE BrE//ɡuːft//
 
; NAmE NAmE//ɡuːft//
 
-ing form goofing
BrE BrE//ˈɡuːfɪŋ//
 
; NAmE NAmE//ˈɡuːfɪŋ//
 
 
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[intransitive] (informal, especially North American English) to make a stupid mistake Sorry, guys. I goofed. Word Origin early 20th cent.: of unknown origin. Phrasal Verbsgoof aroundgoof off
See the Oxford Advanced American Dictionary entry: goof