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1.
When you are having sex with a girl, and a black guy jumps out of the closet and punches the bitch in the face.
I was fucking Tina last night while Anquan was over, and the bitch got black knighted!
by The Day Walker November 12, 2011
 
2.
V. past
To have three or four limbs removed, like Monty Python's Black Knight. Generally happens when one is owned by a bladed weapon.
Obi-wan just Black Knighted Anakin at the end of Episode III, look, he's only got his robot arm left
by masaki-kitsune March 23, 2009