A person who buys/wears glasses for no purpose other than they think that it's fashionable. Their eyesight is not impaired in the slightest, and they usually take the form of your generic skank, hobag, whore, or just all around bitch. Its like getting braces for fun when your teeth are really fine. (this obviously doe not apply to sunglasses, which are another matter entirely).
Girl - "Oh I didn't know Vanessa had glasses. Did she used to wear contacts or something?"
Other, more observant girl - "No, she's just a glasses skank, as you can see by her too tight, ripped up shorts and overly dyed and straightened hair."