The Murloc sound comes from the Murloc enemies in Blizzard's World of Warcraft, where their strange gurgling voices became one of the game's most recognizable audio cues. Players repeated the noise in text as "mrglglgl," helping it spread through forums, videos, machinima, and memes during the early years of WoW. It is still used because even people who have not played recently often recognize it right away. Online, the clip usually stands for goofy monster energy, incomprehensible speech, or classic MMO nostalgia.