Force fart was a Force power that allowed a Force-sensitive to fire concentrated methane out of his or her ass. Mace Windu was the only Jedi to master Force fart. He used it to PWN like a billion battle droids in the Battle of Dantooine. It also gave Grievous his cough. It was the most powerful technique of Darth Chef, who killed hundreds of people throughout the galaxy with it. Darth Fat Guy was also known to use this deadly technique. A Jedi who did not master Force fart would generally end up doing "Force shit in the face of the person behind you".