A booty-ass nigger is a black being who will willingly, and happily suck on the rear teat of a female being of whichever ethnicity.
Eric: Yo, Pablo, what's up with Jacob? He's been acting real horny lately.

Pablo: Man, Jacob is just a booty-ass nigger trying to get some pussy.
by The Holy Nipple-Dick January 31, 2016
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1. is a butt that is fat and big. This word may be used to define how scrumptious a woman's butt is. Mainly used to portray a Black or Hispanic woman's lower physical feature.
2. May also be used as a racist or derogatory term to degrade Black or Hispanic women's physical appearance. Hence, their buttocks size and shape.
1. My girlfriend has a nigger booty.
2. That girl's ass is so big, such a nigger booty.
by ThirstyFish February 17, 2012
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