Top Definition
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

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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

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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

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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

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mbm
Stands for mom behind me. This is used when you are texting on the phone and u don't want the other person to send inappropriate language to you, the person behind you does not have to be your mom just someone you don't want seeing anything.
Guy: you're so sexy
Girl: hold up! mbm
by allons-ycompanion March 13, 2015

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MBM
Made By Man
That movie was so MBM.
by Shitgirlssay January 21, 2012

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MBM
MitchBond moment: the complete misspelling or understanding of a given word's definition.
That car is susidle man!

This ontray to the meal is great!

Wow, you guys had real MBMs there!
by EV514 January 02, 2010

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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