A person of color who is interchangeable with another person of color. It was coined by comedian Adam Carolla on his podcast "The Adam Carolla Show" on 9/11/12.
Person A: Oh no, I heard Michael Clarke Duncan kicked the bucket. I wonder who they'll get to play Kingpin in "Daredevil 2."
Person B: Well, let's see. Ving Rhames, Terry Crews, hell, even Jim Brown. All good blacksimiles.