A preptard, is basically a prep in general. Most preps are preptards. You know, preps, the snotty rich girls that think they're all that, that DESPISE emos for some God-knows reason. Studies show that %98 of preps are preptards, so the entire name should permanently named of such.
I dress in all black, and I listen to "emo" music. Apparently, some people don't mind their own business and have a problem with that. That specific group of jerks are called Preptards.