Prior characterization means nothing. If it meant something, then shouldn't she have said something intelligent, funny or awesome, rather than something I would expect to hear during an argument between two high-school girls? Since I work in a high school, I mean that literally. That's the way high school girls insult each other, and I can easily picture one of them using that exact line, though in the school where I work, the chances of one of them being white and non-hispanic are very small.