boy 1: hey, you see that girl over there? boy 2: yeah man look at that face? shes a 15
"pronunciation: "ah 15"  a 15 is a way of describing a girl who you are unsure you want to sleep with, whether she is not sexy or just fugly
"boy 1: hey, you see that girl over there? boy 2: yeah man look at that face? shes a 15" What is the definition of "a 15"?