she waits around until you a your bf broke and takes the sloppy seconds.
more than likely has brown hair, chubby, and brown eyes.
she usually still keeps talking to your bf when you dont now it, because shes trying to get with him.
if you have a sleeze of a bf then he'll probably cheat on you with her.
2/3 of the time its a past ex, who wants another go.
"Are you dating her?"
"Nah man, she's just my backup girl."