Definitions by Anne Haight

shark 

To talk while one's opponent is attempting to make a shot in a game of pool, with the intention of distracting them or psychologically affecting their confidence so that they miss the shot. Applicable particularly to a game where there is a bet involved on the outcome. Sharking is considered an etiquette violation in friendly games, as well.

"I'm trying to concentrate here. Shut up and stop sharking me."

shark by Anne Haight March 19, 2008