BMF

A Big Muthafucker!; an obese fat ass with no security system on their refrigerator

Look at that BMF!! She's a big muthafucker!!

by Eric and Keena July 23, 2004

BMF

Best male friend

Guan is Alyssa's BMF

by Jlyssa Raakbar April 10, 2015

BMF

Big Mountain Fudgecake

A fictional band from King of the Hill, consisting of John Redcorn, Lucky, and that other redneck guy.

Ladies and gentleman, Big Mountain Fudgecake!!

BMF - the Cake don't sell out.

by FilterThis February 22, 2016

BMF

Butt Movie Fuck

I was at the Drive-In movie with Amber, and by the time it was 10 minutes into the movie we were BMF-ing

by Larzzsucksdick August 6, 2009

BMF

Big Middle Finger

That guy cut me off, so i gave him the BFM

by Ralakan April 16, 2003

BMF

Brittany Mimeault Foster

The sickest goalie ever

by just wondering August 24, 2003

BMF Rule

Big Mother Fucker Rule,
When your friend drives a tiny car, the big mother fucker automatically gets front seat, if there are two big mother fuckers, you take two cars

Sean - SHOTGUN
Jeremiah - Nah dude, BMF RULE
Sean - Fuck that, its a four door
Jeremiah - Dude its still BMF RULE, get in the back
Sean - I fucking hate you, get the fuck out of my house

by JeremiahFBaby October 23, 2008