Top Definition
Newly found blood gang off the Trey 9 set. Consisting in Bronx, New York; Richmond, Viriginia; Cleveland, Ohio, And Deland, Florida. Normally found wearing black and red.
Crip 1: You heard of them Black Mafia niggas?
Crip 2: Yea dem bm niggas go hard
by Devon Simmons March 05, 2008

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