A 15 - A 15 is a girl you're not sure if you want to take home and

A 15 is a girl you're not sure if you want to take home and eat for dinner or just kick out the door.

Hey man, that new girl in class is a 15. I'm not sure if I want to date her or just slap her.

This girl is a 15. I tried to ask her out and she said I was 'not worth the effort.'

I saw that girl at the mall and I'm like, 'Man, that's a 15.'