The phrase comes from everyday French slang, where wesh is an informal greeting that also expresses surprise, and the full line translates roughly to asking how someone managed to do something. No specific original video or speaker is widely credited for this short recording, so it circulates mainly as a standalone reaction clip on soundboards and social edits. Its popularity comes from how quickly it communicates amazed disbelief without needing context, making it useful across gaming, sport, magic and everyday fail or win videos shared online.