A game created by Burnie Burns, the creator of Red vs Blue. It is a game, played on Halo 3 Foundry, where there is a bomb in the middle of the playing field and either team must take the bomb and score it by planting it on the opponent's side of the field.
David: Oh man, I was so close to scoring on the other team in the Grifball tournament!
Joe: I've seen you play. You suck so bad, I bet that the other team almost let you score to make your team feel better.