It's all in the eyes.
Aside from that, as others have pointed out: smoking, tattoos, streetwalker clothes (shoes and short skirts especially), over the top eye makeup, exaggerated raspy voice (I think they call it vocal fry these days), and very curly hair, though that one may just be something I've experienced.
Aside from that, as others have pointed out: smoking, tattoos, streetwalker clothes (shoes and short skirts especially), over the top eye makeup, exaggerated raspy voice (I think they call it vocal fry these days), and very curly hair, though that one may just be something I've experienced.