The phrase is German for that is not stupid, and the clip circulates online as a short reaction sound rather than from a widely documented film or show. Its exact recording origin is not established, so it is mainly shared as a standalone meme audio on soundboards and in short videos. German language clips like this often spread because the serious tone sounds funny even to non speakers, and this one has become a quick verbal shield for bad jokes, clumsy builds and ideas that turn out to work.