The line comes from Dumb and Dumber, the 1994 comedy starring Jim Carrey as Lloyd Christmas and Jeff Daniels as Harry Dunne. In the film, Lloyd delivers the remark with exaggerated politeness before making a quick exit, a combination that made it easy to lift out of context. As short movie quotes spread across soundboards, reaction videos and short-form edits, the clip became shorthand for a sarcastic farewell. It endures because the setup is instantly recognisable even without the scene, and the breezy goodbye works over almost any awkward departure.