acronym. (n). Stands for Fucking Ignorant Bastard.

Meaning a shallow, narrow-minded, opinionated person who cannot tolerate any opinion contrary to his/her own.
Don't argue with Jack. He's a FIB. It's like arguing with a rock.
by Back Burner April 03, 2005
Fucking Illinois Bastard

A lame excuse for an acronym orginated by Wisconsin residents in between daily inbreeding and masturbating to portraits of Vince Lombardi.
without these FIB's contributing so heavily to our economy we would all be poor and even more WORTHLESS.
by chip douglass April 18, 2005
Fucking Illinois Bastards or Federal Investigation Bureau. Either a despective way of Winsconsin people to call Chicagoans or the FBI parody of GTA V.
I killed some FIB police officers yesterday on GTA Online!
I hate those FIBs!
by Tupamaro4Ever December 06, 2014

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