Big Fucking Idiot ... in replacement of FBI - Federal Bureau of Investigation. Mockery of Police.

or

Big Friendly Idiot, like the old story of Big Friendly Giant.
Chamillionaire :

Til I talk to my lawyer, you get no reply
You've obviously been watching too much CSI
I'm not a crash dummy so don't even try
To talk your dirty trash to me, no BFI
by kooni November 1, 2007
Before Ferrahian influence. not being in the influence of the dumb bitches that think there hot shit and create a world of drama and have no clue what the outside world is like.
the new girl is BFI . shes new.
by yeedatsdatgoodshit September 1, 2008
Butt Fuck Idaho-To drive aimlessly, and not know where you are going, and ending up in some hick town where the people all have summer teeth!
"Dammit!! Everytime i let you drive, we always end up in BFI!
by Macabre(EJR) May 12, 2003
Bed For Indigents
Evan: "Dude, I was passing by that laneway by the Mr. Lube, and some homeless guy crawled out of the dumpster, all stank and nasty! I think he slept in there!"
Art: "Dude, of course, that's a BFI!"
by g-othermal August 28, 2008
BFI means Big Fucking Intake.
It is the action of turning your normal air intake on your car into one that has the ability to suck in more air, therefore providing more power.
Ay dood, I jus did a fully hektik BFI on mah S15, I can now do drifts maight.
by smithter December 11, 2010
Bowel forced incident - when you and a partner mash your buttholes together and simultaneously take a dump.
After the date, we went back to my place for a glass of pinot and a BFI.
by Those 18 guys November 21, 2022