The rebellious teenager was everything the girl (Lindsay) wanted to be, but wasn't. She had been a chicken shit for too long as a kid for anybody who knew her well to buy the rebellious teenager act.
Natalia: Oh jeez do you smell that??
Katelyn: Yeah my roommate had another chicken shit and pulled a stink-eyed hippo.
Natalia: Why does she always have the spouts?!?!?!