World of Warcraft, Blizzard Entertainment's long-running online role-playing game first released in 2004, gives each playable race its own voice lines for emotes, including a distinct laugh for human male characters. Players have heard that laugh in towns, dungeons and raids for years, and clips of it later spread through gaming videos, streams and soundboards as a shorthand for a cheerful in-game reaction. Its familiarity keeps it useful: even outside Azeroth, the sound instantly signals a lighthearted, game-flavoured laugh without needing any explanation.