The phrase itself is German and works as a rude but comic way of telling someone to leave you alone, similar in spirit to telling them where to go. The clip comes from a short phone recorded video with no confirmed public source or named speaker, so its life online is mainly as a shared soundboard and chat reaction. Short foreign language brush offs travel well because the tone carries the meaning even for listeners who only partly understand the words, and this one keeps being reused for exasperated, joking replies.