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1.
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
22 11
 
2.
mbm
Married Black Male, Married African-American Male. same as mwm but black. usually found in classifieds, etc
MBM looking for a MBW for a discrete hook-up.
by Chanticlear January 07, 2008
26 15
 
3.
MBM
Mildy Bellied Male- A phrase coined by Patrick Roberge, it's the response to "BBW", where the man is not fat or significantly overweight, but does still have a belly.
"I'm not fat, I'm a MBM!"
by creativexangst August 10, 2012
10 1
 
4.
MBM
Made By Man
That movie was so MBM.
by Shitgirlssay January 21, 2012
6 3
 
5.
mbm
mom behind me. Used in AIM to tell the perosn your mom or some one else is behind you and to keep converstion clean.
Bill: Lets smoke that weed on Saturday

Bob: MBM

Bill: wat you doin this weekend?
by Ryan March 11, 2005
16 13
 
6.
mexicans built my skool, the name of a skool
"omg mbms!!"
"i went to mbms"
by sammykinzandabster June 26, 2009
3 3
 
7.
mbm
Mates Before Muff

To choose your mates over a female
Mate, you should have gone with that bird and left me, mbm man.
by NickBell July 16, 2006
11 11