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Bad Ass Mother Fuckers who party & bullshit. They don't care what other people think of them, and are usually heavy drinkers.
Damn those girls are BAMFs, we should party with them.
BAMFs by stephhhaniie August 1, 2009
Related Words
some one who belives that there always a bad ass mother fucker
1.Bamfism was created by bamf duh
bamfism by weeeewooooweeewoo June 6, 2009

BAMFCSSOAB 

Bitch Ass Mother Fucking Cock Sucking Son of a Bitch

commonly used by those who are extremely pissed or Canadian.
Guy1: Dude what happened?
Guy2: You passed out so the party was over.
Guy1: WHAT!
Guy2: Don't worry tho i fucked both those chicks.
Guy1: BAMFCSSOAB
BAMFCSSOAB by Mr.Santiago May 5, 2008
Bamfs is used to call someone a bad ass motha fuckin slut
these people are admirable

every girl admires to be one
my bestfriend Ashley is a bamfs

hit her up ;)
BAMFS by dskfjskdf November 30, 2010

Bamfasaurus Rex 

Supreme badassness. BAMF + Tyrannosaurus Rex = Bamfausaurus Rex.
What's more badass than a T-Rex? Nothing.
Dude, how Bamfasaurus Rex would it be to jump off that wall!?

He thinks he's all Bamfasaurus Rex now.
Bad Ass Mother Fucking Sav
someone who's more than just a sav or a BAMF they're both combined.
No fucking way! Did you just see that BAMFS do a perfect swan dive off the bridge?
BAMFS by pwnzorized January 16, 2008