Simply defined... a BLACK ASS. Used in Puerto Rico, to indicate, the color of the gluteus maximus in an individual, or, to describe, how dirty is the person's ass.
Oye, el novio de Giselle, se cree blanquito, pero mirale el culo prieto!
(Hey, Giselle's man thinks he's white, but, look at his black ass!)
Abigail is a one of a kind girl, i can’t get over he brown beautiful hair, her brown hazel eyes. it’s just ugh. she’s the most shyest women you’ll ever meet, she usually keeps to herself.