The line is associated with German comedian Teddy Teclebrhan, whose punchy, character-driven comedy has made many of his short phrases popular as reaction clips online. 'Was labersch du?' translates roughly to 'What are you talking about?' and is used in German slang when someone is talking nonsense. Shared through TikTok edits, YouTube videos and soundboards, it has become a handy shorthand for disbelief among German-speaking creators, and its blunt tone keeps it useful long after the original clip first circulated.