mmfb stands for my mother fucking box. It is a term used by soccer goalkeepers. It refers to the box they are allowed to pick the ball up in. The term means no one can come in and score a goal because it is the goalkeeper’s mother fucking box.
by Ghzjsjwhdvbsh October 20, 2018

I woke up one morning, and I kicked my dog
I beat my neighbors skull in with a big ol' maple log
I called his big fat hairy wife a big fat hairy slob
I had the blues
The Mean Mother Fucker Blues (MMFB)
I beat my neighbors skull in with a big ol' maple log
I called his big fat hairy wife a big fat hairy slob
I had the blues
The Mean Mother Fucker Blues (MMFB)
by psychobilly1000 September 10, 2011

by liz6969696969 January 04, 2012

As in the way of life of a true gangsta. In the words of Lil' Wayne, "I be makin' money and fuckin' bitches". It is a way of life, whether gangsta or businessman. MMFB is what the best of us do.
by MMFB For Life December 27, 2008
