fess up 

to admit the truth, confess

Come on fess up. I know you aren't really that sick.

fess up by The Return of Light Joker November 13, 2009

fess up 

to confess

"Fess up or we'll all be caught"

fess up by Pete January 20, 2004

fess up 

to insult or violate someone

P1 - Shut the fuck up nigga, I'll dead fess you up
P2 - This nigga swear he fess up people

fess up by spinvvs March 1, 2023

fess up 

Also used as "fess it up"
1) To give or relinquish.
2) A request for booger.

1.
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!

2.
C'mon baby fess up some of that booger!

3.
Dude, did you get her to fess it up last night?

fess up by [KmA] Jumper May 28, 2005

fess me up 

Talking disrespectful to another individual which can cause confrontation .

Don't try and "Fess Me Up"

fess me up by SlangGang101 March 14, 2018

fessup

an act of eating asphyxiate

they put a fessup on him"

fessup by Marc2.0 June 18, 2023