The phrase comes from everyday French slang, where bz is a shortened spelling of baise and hein is added at the end for emphasis, like a raised eyebrow in spoken form. No single film, song or named creator is reliably tied to this recording, so its life is mainly online rather than in its original context. It circulates as a short voice meme on soundboards and in edits, reused whenever a scene looks rowdy or uninhibited. Its appeal stays in the delivery and the slang itself, which French speaking viewers recognise instantly.