MBM

Mass Bowel Movement, when 5 people or more gang up and go take a crap in the same toilet so as to plug it up

-What's that smell?
-The janitors had an MBM because they wanted higher pay
-oh

by Chantecleer February 20, 2008

D.U.M.B.

Dormant Unresponsive Malleable Boner

Its not hard, its not long, its just D.U.M.B.

by the Acronym guy August 7, 2009

MBS

MBS stands for "My Bad, Sorry".

sms/msn

"Hey, why didn't you tell me SHE had a crush on me???"

"Damn I forgot; mbs."

by ann0nym0us March 25, 2008

MBC

Acronym.
Muddy Bum Crack
An act performed by a group of roudy rugby players, in which they victimise a birthday boy, by tackling him to the ground and restraining him, whilst others take clumps of mud and shove it up his butt.

Defensive line: hold, ready, MBC
Birthday boy: arrgh noooo, let go, get out my ass.

by Bryan manderson April 15, 2008

mbd

Short for "My bad dude(s)"

Gio: C'mon Jackie, that's just a skip-it!
Jackie: MBD...

by J.Lee May 24, 2005

Mbd

Mbd stands for Mental break down

An mbd is when you let all your emotions build up to the point where they all burst out at once. You cry & you scream and everything bad in your life seems to be piled up into one. There's almost no way to calm down at the moment , but you'll soon realize that was a sense of relief. Mbd's could be prevented by talking to someone YOU TRUST about your problems regularly, rather than keeping them to yourself. Mbd's can last 20 minutes or days. If you're having mbd's regularly for about a month or more, its depression. Stay positive!

by beautiful peach June 15, 2017

MBF

Acronym for Metro Best Friend

Yvi: Who's that guy over there with the v-neck?
Christine: That's just my MBF, JP.

by TheJBCrew April 28, 2011