Really hott chicks that just sit at parties, and do nothing but look hot, talk shit, text, dance for five seconds, and do absolutely nothing with guys. Compared to a poster, because just like a poster, you can only look at their inutile beauty.
Damn, look at dat poster over there doin' nuttin but postin'.
Look at dat poster sitting on another poster like a post-it note.
Man, you see that fine ass bitch over there sitting with her friends doing nothing but texting, ignoring guys, and gossiping. Yeah, don't talk to her she's a poster.