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1.
When white actors would paint their faces black to resemble black people. Accompanied by a performance stereotyping them as buffoons.
The white actor donned blackface for his minstrel show.
by John Big July 21, 2005
 
2.
a white man who get make up done to look like a black man for a movie
Robert Downey Jr. was the black face in the movie Tropic Thunder
by mrs. cutie bird August 13, 2008
 
3.
People that work in call centers. this phrase was created due to the fact that most people work in call centers in United States are black.
Dude, everytime I call Dell customer service, I either got routed to India or I get to speak with one of the black faces.
 
4.
Referring to a sex act, in which one partner releases feces into their hands and continues to smear it onto their other partners face.
"Did you hear that last night Jon let his wife put him in Black Face and that he's still walking around with it on today?"
by NoahL November 30, 2007