The phrase is everyday German, and the clip circulates online purely as a reaction sound rather than as a famous quote from a named film or show. German-language meme pages and soundboards helped it cross over to international audiences who use it even without speaking the language, partly because the shrug in the voice is easy to understand. It sits alongside other short reaction clips like the bruh sound, where a single flat delivery becomes shorthand for a whole mood in edits, streams and chats.