Gamethrowing

When you playing party games, you don’t play your game role and doing things that may help other team to win.

Example for Werewolf party game:
(Villager)John:Jack is werewolf!
(Villager)Jack:I am villager! Either you are werewolf or you are gamethrowing!
(Werewolf)Mary:Yeah obviously Jack is wolf, John can’t be gamethrowing, lynch Jack!