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3. fess up

fess up

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fess up (to something)

to confess to having done something. (Short form of confess.) I tried to get the boy to fess up to doing it, but he wouldn't do it. Come on, fess up.

See also: up

fess up

v. Slang

To admit to something; confess something: The treasurer fessed up when confronted with the evidence of fraud. The gangster fessed up to the crime.

See also: up