Leroy Jenkins comes from a 2005 World of Warcraft parody-style guild video in which the character Leroy suddenly charges into danger while his group is discussing a careful plan. The shouted name became one of the most famous gaming memes online and spread far beyond MMO culture. It is still used because the joke is instantly clear: someone ignores strategy, acts on impulse and creates chaos. The line remains a staple in reaction edits, gaming montages and internet humor.