The phrase comes from French TikTok creator destyl0w, whose exaggerated 'On est jeudi' became a recurring joke across his videos, many of them connected to GTA Online and stunt clips. Fans began repeating it every Thursday, turning a simple date announcement into a weekly ritual and a recognisable in-joke for his audience. Because the wording is short, musical in its stretched delivery, and tied to a specific day, it travels easily into edits, reaction videos and gaming montages, where it still signals that the week is almost over and the fun part is about to begin.