Hmpf has no single famous source to point to, which is part of why it travels so well online. As a universal sound of disapproval, it appears in reaction videos, meme edits, gaming clips and short-form comedy, where a creator needs a quick, wordless judgement without explaining the joke. Its brevity makes it easy to drop into a cut, a caption or a reply, and because almost everyone recognises the tone instantly, it works across languages and audiences. That instant readability keeps it in regular rotation for sarcastic, unimpressed and deadpan moments.