What is B.m.?
1.
Short for bowel movement.
The act of dropping shit
Sorry, I need to have a b.m., where are the jakes?
2.
Short for "baby mama," which means the mother of a man's child.  
"I was chillin' with my B.M. and my daughter."
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3.
battle mountain nevada
BM shits on elko, winnemucca and spring creek....bitches
4.
The shortened version of baby's mom or mother of child.
He is acting kind of funny because his b.m. keeps calling him.
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Random Words:
1. 
is another way of saying dumb
when you play the song Karate by Tenacious D at the end of the song you hear him say something really wie..