look up any word, like fleek:
 
29.
Fat Incompetent Ball Sack
Gibbs is such a FIBS... he can never do anything right
by Jeff Morrow May 23, 2007
 
30.
fib
Fuckin' Illinois Bastard
I have had a second home (cabin on a trout stream) in Central Wisconsin for over 30 years. Among my cheesehead friends in the local taverns, I am known as the King Fib. I don't regard it as perjorative; indeed, I am kind of proud.
by Pawnee April 08, 2007
 
31.
Fucking Itchy Balls Syndrome.

FIBS usually doesn't occur in private, but most likely during a family dinner, a formal event, or something similar. Symptoms include uncomfortably itchy scrotum/pubic area, awkward lower body movement/squirming, and near uncontrollable urge to thrust hand in pants and scratch scrotum/pubic area.
"Dude, why are you fuckin dancing around like that?"

"I got a bad case of FIBS, man."

"Fuckin scratch them, idiot."

"I can't while we're taking the fucking prom picture asshole."
by Riley July 20, 2004
 
32.
FIB
Friend In Bed. A much nicer way of saying Fuck Buddy.
'That guy you hooked up with last night was hawt!'
'Yeah, he's my FIB.'
by MalevolentWreck February 16, 2008
 
33.
FIB
acronym - Fun In Bed, specifically regarding hot chicks

Get your ass over there and talk to her dude, she's guarenteed to be FIB - just look at her!
by JP33 September 10, 2007
 
34.
Fib
Fat Idle Bastards (normally scousers)
You FIB , get your lazy fat arse from in front of the TV and go and cut the grass.
by Kev68 August 14, 2007
 
35.
FIB
What people in cow/cheese-land (Wisconsin) call people from Chicago.
FIB, and proud of it!
by Gabriel John July 05, 2007