More extreme than a poser, a p0ser is a white person who acts black, usually indicated by excessive wearing of flat-billed hats, sagging shorts, baggy shirts, and wearing shorts under your pants, then sagging those shorts too. Used commonly when calling someone with the description above a poser on the internet since it is impossible to pronouce "p0ser"
Rob: dude did you see Josh at the dance? hes such a poser
James: no dude, hes a p0ser