BM 

acronym for bad mannered, used by korean computer players.

You very BM player. THX thx. kakaka

BM by rustyn January 9, 2008

BM 

abreviation for baby mother, usually used when writing.

Man my BM about to make me mad.

BM by ladawnny October 24, 2011

BM 

Acronym for Bad Manner(ed), popular in the Starcraft (II) community.

John and Zoe take their time to wait for Jack to join their game, and Jack leaves immediately upon it started

Zoe: Jacks so BM.

BM by Advertos March 29, 2011

BM 

Bowel Movement

When listening to the Don and Mike show, I had to take a huge BM

BM by ghandi February 25, 2003

BM 

Abbreviation for "Bowel Movement"

Family Guy S3E14: Chris: What's a library Dad? Peter: Oh it's just a place where homeless come to shave and go B.M.

BM by Heavy D February 2, 2005

BM 

Breakup Message

Yo Gotti: I've seen your girl post a BM so I hit her in the DM

BM by JD Papi August 24, 2016

BM 

Bowel Movement
Take a crap
Take a dump
drop a load
put a brown log in the water

You know; TO TAKE A SHIT.

Damn Cindy, when you made a BM I could have sworn that the whole fucking room shook. It smells like a sewer pipe busted in here.

BM by I forget February 15, 2005