Slutty Brown Chick. A girl from either Pakistan, India, Bangladesh, Trinidad, or even Guyana that wears very slutty clothes, acts whorish, and also talks like one. She has very few true friends and they are usually very ugly; the exact opposite of her. She likes attention but hates to admit it. Avoid these kind of girls for they are not true girls because they do not their true nature.
Hey, look at that brown girl over there she's a SBC, just look at the way she walks.
SBC just happens to be a huge phone company, as well as my ISP.
When AT&T exploded into a bunch of smaller telecommunications companies, their magnetism caused them to slowly reform into the all powerful form they once were. This menacing force would be known as SBC.