It is a southern thing. Used to describe a type of hood mentality. Originated from Louisiana. Used it all the time in High School and then Kids from the Suburbs got their hands on it and it reached the Mall of America.
Oh, and I suppose that "Mall of America" is your little euphemism for white.
not sure with trousers @Synthese. Got it from barneys spring last year I think during one of the sales. They've been hemmed and machine washed a couple of times. Folded over buttoned waist instead of zippers. Googled and pretty sure they're these: