The phrase is French for asking whether someone is sure they slept well, and it circulated online as a short TikTok sound popular with French-speaking users. Rather than coming from a film or television scene, its appeal grew through videos and messages, where people sent it to friends and crushes as a playful morning greeting. Its two-second length makes it easy to drop into edits, duets and replies without breaking the flow of a clip. Because the joke depends on tone and timing rather than a reference, it remains reusable whenever a creator wants a light, flirtatious opener.