Cowloss surfaced as a user-uploaded clip on Jayuzumi, a community soundboard site where short meme noises are shared, remixed and played in streams and chats. Like many sounds on these boards, its exact origin is unclear: the name reads like an inside joke or a deliberately odd label rather than a reference to any film, show or song. It gained a small following through Discord servers and meme edits, where its brevity made it a handy reaction sound. It is still used today as a quick comedic punctuation mark.