The Spirit of the Game

"Spirit of the Game. Ultimate relies upon a spirit of sportsmanship which places the responsibility for fair play on the player. Highly competitive play is encouraged, but never at the expense of mutual respect between players, adherence to the agreed upon rules of the game, or the basic joy of play. Protection of these vital elements serves to eliminate adverse conduct from the Ultimate field. Such actions as taunting of opposing players, dangerous aggression, belligerent intimidation, intentional fouling, or other 'win at all costs' behavior are contrary to the Spirit of the Game and must be avoided by all players."

From Section 1. Introduction, item B. Official Rules of Ultimate: 10th Edition