Gym Slut
noun- a boy or, most typically girl, clad in skin showing 'workout clothes' in hopes of getting play, giving boys boners, or trying to gain self-confidence by sacrificing dignity.
Boy 1- Damn! That girl has a fine ass booty.
Boy 2- Yeah I hope she goes on the treadmill and we'll see her jugs
Boy 1- I've never seen a Gym Slut with such big ones!