Something shouted in order to distract an opponent in a sporting event or other contest which requires skill to set up or execute a shot, most often heard in golf games (especially miniature), but also heard when playing pool or darts. From the film Caddyshack, when fellow caddies taunt Noonan in the hopes that he will miss a critical putt.
Noonan! Miss it, Noonan! NNNNNNooooonan!