The Leeroy Jenkins meme comes from a 2005 World of Warcraft video in which a player charges into the Rookery in Upper Blackrock Spire while his guild is still planning, screaming his character's name. The clip spread across early forums and video sites and became one of gaming's first viral moments, later referenced by Blizzard itself. It endures because every game has a reckless teammate, keeping it alongside other gaming callouts like enemy spotted and bomb has been planted.