1. Mostly referenced to a white teenager who, in high school, tried a bit too hard to please the in crowd. And probably pissed off a lot of black people by stealing the style their culture has had for many generations. For example: Ebonics, sagging of clothes with untied sneakers, really tiny skirts with corn rows, little whitey listening to rap... That kind of thing. In other words, the white kids in Detroit.
2. A liar, deceiver, imitator (see mime), and generally a football player or cheerleader.
Boy: Remember that girl in high school who thought she was faux?
Boy: Well, now she's fat, pregnant, and divorced and she's only 19... A lot of good her popularity did her, eh?