Ah bah oui is a common spoken French expression used in everyday conversation to mean well of course, and its clipped delivery made it popular as a reaction sound online. Shared as a standalone meme audio, the Antoine version spread through short form edits and soundboards where very short voice clips are reused as instant replies. It stays in use because the meaning is understood even by non French speakers from tone alone, and its brevity lets editors drop it into fast paced jokes without slowing the scene.