Abreviation for Bowell Movement (Verb I guess) Certainly not to be used anywhere near to "yo baby's Mama" and one poor sole has suggested.
Eating a balanced diet will result in healthy floating B.M's; not the bowl stanging sinkers most gangsters coil in dimly lit, fetid tiolets.
by Priz Biz Sage June 10, 2005
BMW - A German car found in many rap songs.
I got twenties on my BM and you still fuckin' wit a GM.
by The Don Mega October 07, 2005
Acronym for Big Momma. Stands for middle aged women who are obese and rude to little white girls.
Dang, why is B M so mean to little Marissa and Jenna?
by bdong January 01, 2011
acronym for BLACK MALE.
yo gurl! check out that B M...he is FOINE!!!
by cahronda February 02, 2006
What you call your baby mama when you're too mad to even call her baby mama.
Man now my BM even has my mom on her side. Females, smh.
by Felicia93 January 19, 2015