The phrase itself is French, roughly meaning oh, that's Rebecca, and the clip circulates mainly as a WhatsApp audio and soundboard sound rather than from a widely documented film or show. Its origin is not clearly credited, which is typical for short voice notes that get forwarded, renamed and reposted across chats. Because the line names a specific person in a familiar, teasing tone, it spread as an in-joke among friends and editors who reuse it whenever a Rebecca appears, behaves predictably, or becomes the subject of a meme.