fess 

1. (verb) to admit that you did something wrong or damaging; shortened form of "confess"
2. (noun) to be highly professional; to treat something as if it were purely business

1. He fessed up to borrowing Mike's car.
2. He wore a suit and a tie during Finals Week. What a fess!

fess by Mickey K December 20, 2010

Fess 

When someone is saying nonsense and you got enough from them (bla bla)

When sarah was saying the joke yesterday I went fesssss

Fess by Flossing up May 30, 2020

FESS 

the coolest person ever, emo, morgz fan and tal fan, best person, too cool, 😎😎😎😎😎, rapper and singer, gymnast, fidget queen, famous person, and other cool things 😊😊

person: hi i am bffs with fess
another person: OMG YOU ARE SO LUCKY

FESS by coolemo420 July 24, 2021

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 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

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