An offensive unpleasant person. Absolutely no fun to be around. As useless as a cock (penis) in a bag.
Look at that guy at the bar over there perving down the girl's top and trying to squeeze her butt while she is clearly revolted - what a cock in a bag.
Woman or Tramp that goes from cock to cock. She is nomadic when it comes to the cock. .She is territorial and will defend her cock. However once she is done she will leave and move on to a new cock