The exact origin of Tefo Kos is unclear, but the clip circulates online as a repeatable meme audio rather than a widely documented quote from a specific film, show or game. It spread through short-form edits, reposts and joke compilations where unusual phrasing becomes funny through repetition. Part of its staying power is that people do not need context to use it: the sound works as a strange reaction, a deadpan interruption or a deliberately random ending to a video.