blackberry messaging.
My sick blackberry curve that i got from blovi. Blovi used his blackberry to get a bbm from Kevin.
by PatrickO December 13, 2007
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Big Bowel Movement. When one has a larger than usual bowel movement.

Also Why Black Berry Messenger's abbreviation of BBM is poorly planned.
1.) I had a huge dinner last night and just had a BBM, someone should clear the toilet.

2.) Pull the car over, I need to take a BBM.
by Uselessman81 August 5, 2010
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Big Black Man
Usually talking about a sexy, classy black man.
Look at that BBM over there. They sure don't make them like they used to.
by lemony765 April 6, 2011
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BROKEBACK. FUCKING. MOUNTAIN.

BBM stands for 'Brokeback Mountain,' a movie about two male cowboys who fall in love. Starring Heath Ledger and Jake Gyllenhaal. Directed by Ang Lee.

Also referred to as 'The Gay Cowboy Movie,' by those too ignorant to realize it's so much more than that.
No one will go see BBM with me. Fucking homophobes.
by Keshia Lee December 30, 2005
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A person failed to get a college diploma but insisting that he/she has the degree.
:Hey, Is Ferdie didn't finish his study abroad?
: Yes, he's BBM.
by Reincarnated_Einstein November 6, 2021
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Boobs to Body Mass index. The size of a females boobs compared to the size of her body. Therefor a girl with small boobs can have a large BBM if the girl is small also.
Dude, that chick might be small, but she has a massive BBM.
by yankeesrawsome April 19, 2011
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