Cool Chick

A girl who acts like your best friend after only a few encounters. Very fake and usually has no other friends/lost their friends due to her fakeness so is desperate to suck up to anybody she meets.

Girl 1: I thought Alison was being friendly, but it's weird how she keeps talking to me and pulling me away like we're best friends.
Girl 2: Wait, you're not bffs?
Girl 1: No way, this is my second time meeting her.
Girl 2: Dang, what a loser. She's sucha cool chick.