Definition of Fess up

to tell the truth

Examples of Fess up in a sentence

After hours of being questioned by the police, the exhausted suspect decided to fess up and tell the detectives about his role in the crime.  

None of the children would fess up when asked who broke the lamp, so mother decided to punish them all until someone was truthful.  

Adrian was the only one honest enough to say he cheated on the test when their teacher asked the class to fess up.  

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