A game mechanic
, the fantasy-anime setting game from White Wolf Studios
Stunt Dice are, essentially, dice awarded within the Storyteller Game mechanics system to exceptional cool actions. They increase the chance of success of cool actions, and thus simulate a comic book reality wherein trying to be a badass and engage others is encouraged rather than the opposite.
Stunt dice are awarded in ones, twos, or threes. One die is awarded for a well described action, two for a well described action that takes the environment into account, and three for an incredible and unorthodox description.