To diss; to insult.
Jane (to John): you're dumb stupid.

Joe: ohhhhh, you just got fessed up.
by Yugojokes July 14, 2011
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Come on fess up. I know you aren't really that sick.
by The Return of Light Joker November 14, 2009
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"Fess up or we'll all be caught"
by Pete January 20, 2004
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admitting something.
Kudos to the teen for fessing up the whole story.
by happymonday October 30, 2013
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P1 - Shut the fuck up nigga, I'll dead fess you up
P2 - This nigga swear he fess up people
by spinvvs March 1, 2023
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Also used as "fess it up"
1) To give or relinquish.
2) A request for booger.
Person A: I'm goin' to the store - you want something?
Person B: Yeah, get me a dope and a moon pie.
Person A: Fess up some $, biatch!

C'mon baby fess up some of that booger!

Dude, did you get her to fess it up last night?
by [KmA] Jumper May 25, 2005
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Talking disrespectful to another individual which can cause confrontation .
by SlangGang101 March 14, 2018
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