This version is presented as a homemade recording rather than a clip taken from a film, television show or well-known viral character, so it has no single credited source to trace. That homemade label is part of its appeal: the sound is not a polished studio effect, but a plain vocal reaction that creators can reuse without it pointing back to a specific scene. In short-form edits it works as a generic sigh of disappointment, and its close cousin Fahhh shows how easily the same drawn-out vocal can be remade and shared in slightly different forms.