The phrase comes from Brazilian WhatsApp voice messages, where short, exaggerated reaction audios are passed between friends and reused in chats, memes and short-form videos. Its appeal is the sound itself rather than a clear meaning, with the playful shout and stretched 'ihuuu' working as a universal burst of excitement that needs no translation. Like many WhatsApp audios, it spread through forwarding and reposting rather than through a film, song or television show, and it remains popular because it is short, loud and instantly recognisable in a chat.