A hollaback girl is a girl that is somewhat of a tramp. Shes the girl that you see walking
down the street in a skimpy shirt and when guys drive by, they "holla" at her. A hollaback girl by
definition, then proceeds to "hollaback". After the Hollaback, she'll "hop in" the guys car.
Usually these girls are girls that are not popular because of their class or
sophistication, but because they "put out".