BM 

Slang for for a BMW, notably used in the Notorious B.I.G.'s "Big Poppa"

Biggy: Drop top BMs, I'm the man girlfriend

BM by si11y f4ce October 6, 2008

BM 

bad mouth

Person 1: Hey dude I went on your account last night
Person 2: I hope I don't get banned...
Person 1: Sorry bro I BM like crazy..

BM by aDoctorOctopus March 31, 2012

BM 

An Acronym for Bob Marley, the late reggae singer.

Also used when refering to a large blunt or joint

see spliff

Instead of saying, "Let's go smoke a large marijuana cigarette."
one might say, "Let's go hit this BM" or "I just rolled a fat BM, let's go blaze it up."

BM by hithisbm January 31, 2003

BM 

Abbreviation for Baby-mother, baby-moms, or baby-mama. The woman, not necessarily his current girl, that a man shares a biological child with.

Rolands BM is a dumb bitch, for real.

BM by RemyRedd January 2, 2007

bm 

n. Black Metal

I have never heard or seen it been used any other way.

Anaal Nathrakh is very cult bm.

No, dumbfuck, Marilyn Manson is not bm.

bm by Blasphemer_0 February 9, 2005

bm 

whoever the fuck said babys momma is a dumbass, its birth mother

Although living with her father and step-mother, her BM is still alive and living in LA.

bm by ryan September 6, 2004

BM 

An acronym meaning Boatswain's Mate in the Navy or Bowel Movement, no wait, they're the same thing.

Man that BM3 Johnson is a real piece of shite.

BM by Havnav March 26, 2009