BM

1. Short for "Bat Mitzvah" or "Bar Mitzvah"

2. Abreviation for bowel movement...taking a shit

1. Wow her bm was great

2. Eww, her bm was gross

BM

BMW - A German car found in many rap songs.

I got twenties on my BM and you still fuckin' wit a GM.

BM

Baby Mama

The girl's crib you have a baby with.

Man I gotta go run to the BM and get some squares

BM

Blonde Moment
Short moment of stupidity that is stereotypical by blondes.

Sorry, I just had a BM.

BM

BM by itself means bad mannered(probably not what you expected)

In most battle royale games, people will use the phrase BM either when they are getting finished or if they were going to finish someone else.

BM

Either baby momma

Or
BMW.

Depends on the reference.

"Oh shit it's my BM callin.. dont make noise but keep sucking. U know she be trippin if I dont pick up.."

Or

"Check out that matte black BM riding by.. shit looks clean asf."

BM

banky's mom

looks like BM just got here