Pussy-assed n00b tactic in FPS games, particularly the Modern Warfare games, who exploit the cheap auto-aim bot that center's your reticule on your target if you aim downsight while he is nearby. They primarily use the Barrett and Intervention sniper rifles, and do nothing but dart around the map one-shot-killing everybody with no regard for the cheapness of the tactic they are employing. They even make fun of players who use the sniper rifle the right way.
That noob just wants to do nothing but run around and quick scope everybody. Let's team up on him and take him down.