f.s.u. 

Fuck shit up.

I'mma go f.s.u.

f.s.u. by Spikesfromcanada November 3, 2008

F.S.U. 

Abbreviation for "FUCK SHIT UP";

A group formed in the Mary Ward gymnasium, the home of the Wolverines, the group referred to as F.S.U is dedicated to not following the rules, their unruly actions are referred to as "fucking shit up".

Ex 1. Hey Tom, I went to this party and totally fucked shit up.
-Oh man that's awesome, i was home all weekend but I still managed to F.S.U.
Ex 2. hey guys, i'm going to F.S.U. by refusing to fuck shit up...
-what do you mean?
well our group requires us to F.S.U. by not following the rules, so im not gonna follow the groups rules to F.S.U., thereby still F.S.U.
-woah! thats a great big mindfuck.

F.S.U. by FSUQueen September 22, 2012

F.S.U. 

Meaning to fuck shit up but used in a more public setting. To cause disorder in a public place.

lets F.S.U. tonight at the game.

F.S.U. by Dr. J-Smoke January 19, 2010

F.S.U 

AN ACRONYM FOR FUCK SHIT UP (ORIGINATES FROM A SMALL TOWN IN NORTHERN CALIFORNIA NAMED BIGGS)

- WHAT ARE YOU GOING TO DO THIS SUMMER
- GONNA GO F.S.U

- YEA IMMA DO DAT 2

F.S.U by THABIGGMANN May 27, 2010

I.W.Y.T.F.T.S.O.O.M.T.I.S.U.N 

I want you to f**k the sh*t out of me until I scream your name

Guy: hey what do you want to do tonight

Girl: I.W.Y.T.F.T.S.O.O.M.T.I.S.U.N
Guy: *in shock and smirks* say less

I.W.Y.T.F.T.S.O.O.M.T.I.S.U.N by maddawg daddy November 18, 2020

I.F.S.F.U. 

An acronym for "I Feel So Fucked Up". Can be used to refer to yourself in a emotionally or mentally draining state.

Texting:
'ngl ifsfu rn'
(I.F.S.F.U. can be combined with R.N., which is an acronym for "Right Now".)

I.F.S.F.U. by bigboigucci900 January 4, 2023

F.U.S.S 

F.U.S.S is an acronym for F-un U-nrestrained S-hameless S-ex. to have fun hardcore sex with someone that you will most likely never see again.

"hey babe wanna go back to my place and have F.U.S.S?"

F.U.S.S by facegoogle July 14, 2011