fu 

fuck up - to make a mistake.
Mostly used as "fu'd" for fucked up

cyberBOY01: man, I just accidently quit my web browser and my game!
Sh4tup99: dude you fu'd

fu by the Maniac June 23, 2004

fu 

short or slang for "fool"

"Dat fu ain't got shit on me!"

fu by Leah July 30, 2003

fu 

shortened version of "fu manchu" , refering to a specific type of moustache that is gay.

that guy has a fu.

fu by jo jo February 21, 2003

fu 

fu is the short slang abbreviation for fuck you.

Dave: Hey John you're an ass whole.
John: hey dude fu!

fu by Dylan Barkay February 23, 2009

fu 

a type of noodle served by Mama. originating in Mama's kitchen, fu is served to you hot and fresh as soon as the word is mentioned.

ALso being used in any word placement(taking the place of any given word)

Mama Fu' cooked Fu. I ate some FU today.

Excuse me while i visit the FU-cilitles.

I will FU you later.

fu by mama January 25, 2005

fu 

Acronym for 'Forever Unreal'

b00n: lets liek go play sum q4
pr0: wtf! ut2004 fu!

fu by fats0 December 28, 2005

Fu 

A fake ass bitch

You only hit me up when you're bored. You're fu as fuck.

Fu by juuuhurddd February 18, 2017