My stummy hurt circulates online as a short meme sound rather than a line tied to a widely documented film, show, or song, and its appeal comes from the phrase itself. The intentionally babyish wording makes an ordinary stomach ache sound instantly quotable, which is why short-form creators reuse it for reaction edits, skits, and captions about overeating, food regret, and wanting to stay home. Its brevity also helps: at about a second and a half, it can be dropped into a joke without slowing the edit, keeping it useful long after its first viral rounds.