a person, usually female, who as sexual relations, especially oral, with many people for little or no gain. See also ho and jd. Can be used as an noun or a verb.
Noun: You know that one girl Tina up the street? She a jump down.
Verb: Tina was jumpin' down on every last one of them dudes at the party.
A word girls use while talking about how a bricks popularity status will go down hill to "Loner-ville".
Girl 1: Omg i HATE her!!! Shes such a Brick!
Girl 2: Tell me about it! And her little posse? Pff, please!
Girl 3: Couldn't agree more!!! Someday, there gonna Tumble Down to the Ground!!!