Coucou toi is a common French expression meaning hey you, often used affectionately between friends and in playful online messages. As a short voice clip, it circulates on soundboards as a cute greeting rather than a quote from a specific show or meme. French-speaking creators use it to open videos with warmth, while others use it for its soft, charming sound even without understanding the words. Its brevity makes it ideal for TikTok intros, reaction edits and lighthearted WhatsApp-style audios.