Green’s Dictionary of Slang

(US, also bug) a black person.

1949		J.H. Burns Lucifer with a Book 121: I’ve been noticing you’re bunghole buddies with the one boog in this dump.
1968		H. Sackler Great White Hope I iii: Come on, boog.
1970		T. Southern Blue Movie (1974) 181: One of the boogs blows his stack, goes for a broad — pow, you blast him!
1977		J. Sayles Union Dues (1978) 22: Everybody is doing okay, Irish, Poles, the ghinnies even, paddling along, all except the boogs.
1997		E. Little Another Day in Paradise 183: The Indian and the nigger [...] are waiting to get into heaven. [...] Line of Indians as far as they eye can see. Got a short line of bugs.