When one has an incredible score in an online game such as Call of Duty. This score is not a reflection of their skill, but simply states that they were picked by the game to be the "host" of the match, and therefore, were the only one with a half-decent connection.
Person 1: That XxL33t_SnIpEZxX guy just went 34-2. How is that possible? He's only a level 9!
Person 2: Don't worry about it. That guy is just hosting. It won't happen again next game.