Get Rid Of Slimy Girls is Calvin's anti-girl club. The club's goal is to annoy and bother girls, and Calvin's main target is Susie Derkins. The club has only two members, Calvin and Hobbes. Calvin is "supreme dictator-for-life" and Hobbes is the "first tiger". They two usually make plans like throwing water balloons or snowballs at Susie. Often these plans have a bad ending. However, every time G.R.O.S.S finishes a mission or meeting, they always get awards such as medals, honors, and promotions. Of course, the word "gross" also means disgusting.