n. Can be used to describe a male or a female. For women it often means a slore
and for men it usually means a horney jerk.
This comes from a story about a highschool that had a fence in the back where it's students would go to behave innapropriately. The female would put their backs to the fence and then grip the fence with their hands, the idea was for the guys to basically molest the girls who had come up against the fence.
Now it can be used to describe any slutty girl or jerk-off male.