The phrase comes from French youth slang built on verlan, the syllable swapping wordplay heard in everyday speech and online clips. Ré-ssoi flips soirée, meaning an evening or party, and trop de adds the sense of excess. Short French voice clips like this spread easily on soundboards and in short form video because the meaning is clear even from tone alone. It stays popular as a compact reaction for nights that drag on, group chats after events, and edits that need a French meme punchline without extra context or explanation for the viewer.