A girl that is usually between the ages of 12-15, this girl is starting to grow breasts and appealing to guys (or girls...whatever floats her boat). This is when her curves should set in, her hair is set to one color, and she starts to be involved in cliques. She wears makeup to get a guy's attention and is usually too shy to ask a guy out. Between this time period, she may become two-faced, a bitch, an disloyal friend or a liar. This is when people start to judge her and the guys figure out what kind of girl she will be after her adolescent time period.
Guy 1: Did you see Bethany?
Guy 2: Yup, she's finally filling out man!
Guy 1: She was also wearing eyeliner today. Man, she looked H-O-T HOT!
Guy 2: She looks at you a lot, but she always blushes when you say hey to her.
Guy 1: I know, right? You thinkin what I'm thinkin?
Guy 1 and Guy 2: She's finally a preteen girl.