American English

Definition of fess up phrasal verb from the Oxford Advanced American Dictionary

 

fess up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

fess up

(informal)
 
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to admit that you have done something wrong synonym own up (to something/to doing something) It's time for the President to fess up.
See the Oxford Advanced Learner's Dictionary entry: fess up