B)ad
M)other
F)ucker
The wallet Jules Winnfield make insanely popular in '90's.
I bought a BMF the other day, it suits Jules better though...
by Niloc February 21, 2005
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Acronym for "Bad Mother Fucker". Used in special situation were one feels extremely confident or in some cases just plain bad ass.
Frank: Did you really enlisted in the MARINES?!

Bob: Hell yeah, I'm a BMF!
by RP2012 June 23, 2011
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Stands for blowing money fast, most commonly known from Rick Ross's song B.M.F.
Marques: Maaan , you know i be gettin this paper!
Nate: Yeah, but your always bmf. Learn to save.
Marques: Naaaah its coo!
by AyeeJuddayy August 23, 2010
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It mean Bye Motherfucker and Bad Motherfucker. You say to everybody if u want
Person 1: HEY you wanna hang todah:
Person 2: nah man i got to go.
Person 1: KK BMF
Person 2: Bye
by Psyduckium April 9, 2019
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It stands for be my friend
Someone: will you bmf?
Someone else: sure.
by A e b November 8, 2021
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