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2.
When you try to make someone black out by buying them shots but it back fires and you black out instead!
Glen tried to make Christa black out on her birthday, but it totally black-fired and he threw up in the ladies room!
by Stanny1234 November 27, 2010
 
1.
When a non-Black person attempts to do something to or with Black people and the attempt back fires on them.

The attempt often times has friendly intentions, but can still go bad.

Coined by two students in an UNLV World Literature class.
White person: Wuz up my nig?

Black person: Aw hell no! He did not just say that!

White person: That blackfired on me.
by Enz8 December 29, 2011