Leeroy Jenkins comes from a 2005 World of Warcraft video in which a player rushes into the Upper Blackrock Spire dungeon while his guildmates are still discussing their strategy, shouting his own name as he charges. The clip spread quickly through gaming forums and early video sites, becoming one of the internet's first major gaming memes. Blizzard later referenced the character in the game itself, and the shout has remained shorthand for reckless enthusiasm, impulsive decisions and charging in before thinking through the consequences.