Vai tomar no cu is a common and very rude Brazilian Portuguese expression, roughly equivalent to telling someone to go screw themselves. Short clips of people shouting it have circulated for years in Brazil as reaction audios, shared between friends as a joke rather than a real insult. The longer recording here fits that voice note tradition, which is why it spread on soundboards alongside other meme reaction clips. Its appeal stays in the exaggerated anger and in how recognisable the phrase is to Portuguese speakers.