Green’s Dictionary of Slang

(US) a derog. term for a black person; thus attrib.

1971		B. Moyers Listening to America 374: He was a fast little booger.
1974		R. Blount About Three Bricks Shy of a Load 55: There’s a big difference betwen a black man and one of those big jungle boogers.
2000		C. Cook Robbers (2001) 229: That’s my old lady done that. She likes boogar music. Only in here it starts fights.