Poshel nahui is a common Russian obscene phrase used to tell someone to go away, and its transliteration has circulated in Russian speaking chats, gaming lobbies and meme pages for years. As a short isolated clip it became useful on soundboards because the wording needs no setup and the meaning is understood even by listeners who know only the tone. The added smiley in the original upload title suggests it was shared as a joke rather than a genuine argument, helping it spread as a light reaction sound.