FUI 

Fucking Useless Information. What most emails you receive marked FYI really are.

"I wish he would stop CCing all of us on emails FYI. More like FUI".

FUI by Anton Vettel December 3, 2009

FUI 

Stands for Fucked Up Individual.

Dude, Larry just ate bull testicles. He's a FUI.

FUI by Lily Roman August 7, 2006

FUI 

FUI: Facebook Under the Influence. The act of writing, participating, or using Facebook, or any other social network while intoxicated. The modern extension of drunk dialing.

I never should have messaged he/she last night on Facebook. I was so FUI! Now I'll never get in his/her pants!

FUI by Dr. Basketcase December 20, 2008

FUI 

fucking under the influence. having sex while also experiencing the effects of drugs, alcohol, etc. FUI is the 8th deadly sin and is punishable by a 6 month suspension of your fucking license.

Dude I don't remember her at all...I must have been FUI, I don't even remember her name.

FUI by kittybaby7 July 15, 2007

fui 

Variation on phooey. Contempt or disgust towards something perceived as complete bullshit.

Q: Hey, have you tried Amway?
A: Fui!

fui by AtomSmasher October 29, 2004

FUI 

"floating under the influence"; floating on a tube or raft down a body of water, prefferably a fast moving river, while shitcanned (i.e. wasted or fucked-up on any drugs)

Yesterday, while tubing down the mighty Mississippi, Jimmy got a FUI for being intoxcated while flashing his "down-stairs mixup" to the police; his wasted ass went to jail.

FUI by Justin Ianello February 16, 2008

FUI 

Fucked up individual. Usually someone who has done something that is viewed as socially or morally wrong.

Did you hear about Eric beating the hell out of Cam last night? He's in the hospital and he might never recover! Damn, what an FUI.

The old gym teacher got caught with illegal pornography on his computer. I always knew he was an FUI.

FUI by mayanaze February 21, 2017