fess up

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fess up

slang To tell the truth about something. "Fess" here is a shortening of "confess." Come on, fess up—you took the money that was on the counter, didn't you? Can you believe that guy fessed up to all three robberies?
See also: up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

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
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
Crews were turning up to jobs unaware they were dealing with a legal high - and had to rely on one of the patient's friends "fessing up".
"'Fessing Up"." When people hide, ignore or downplay mishaps, they're helping make other people learn the hard way.
Chris Evans' life has had more ups and downs than a lift shaft and here he recounts the giddy highs of his successes while 'fessing up to the many times that his fortunes plummeted in a cloud of chronic plonkerdom.
I'm not 'fessing up to how many." Douglas, 67, learned how to charm women from actor dad Kirk's famous pals.
The Wainwright of a few years ago (before recently fessing up to problems with crystal meth and sex) would have known what to make of a song called "Want." But what does he sing here-and sing so sweetly it breaks your heart?