There is no widely documented original source for this clip, and it appears on soundboards as a short user-shared celebration sound rather than a line from a known show, film, or song. Its appeal is simple and portable: a single enthusiastic yay needs no context, so creators can reuse it across memes, edits, and reaction videos without explaining who Maggie is. That flexibility, plus its brief length, helps it work as a quick reward sound in short-form content where a longer cheer would interrupt the pace.