Murlocs are the amphibious fish-like creatures from Blizzard's Warcraft series, best known through World of Warcraft since 2004. Their gurgling battle cry, often written as mrglglgl, became instantly recognisable because players rarely met just one, a single pull could bring a whole camp rushing in. The sound spread through forums, machinima and early gaming videos as shorthand for overwhelming swarm trouble, and later lived on in Hearthstone and meme edits. It remains popular because the noise alone tells the whole joke about being outnumbered.