look up any word, like usuratonkachi:
 
29.
fib
Verb – to fib. To be harmonically proportionate in face or body features. Fib could also stand for rapid, exponential growth.

Fib is short for Fibonacci Series, a series of numbers (1, 1, 2, 3, 5, 8, 13, 21, 34,....) that show constantly in nature and appear to underlie all processes of organic growth.
ex 1: She is not exactly a supermodel but she surely fibs.

ex 2: He is a moron but his career is fibbing.
by mikesoussan April 24, 2008
 
30.
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
 
31.
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
 
32.
Fat Incompetent Ball Sack
Gibbs is such a FIBS... he can never do anything right
by Jeff Morrow May 23, 2007
 
33.
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
 
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