Video Game Boosting
The act of match fixing and/or colluding in the multiplayer mode of a video game in order to unlock trophies/achievements, boost personal leaderboard statistics, complete challenges etc. This only applies to multiplayer mode as co op challenges, trophies/achievements etc are simply team play.
Little Johny is a not a video game trophy hunter, he is a cheating fraudulent gamer who passes his time "video game boosting" trophies, instead of earning them through legitimate authentic game play.