Ronco de Boi means ox snore in Brazilian Portuguese, and the clip circulates mainly as a WhatsApp audio shared for laughs in chats and groups. Its exact origin is unknown, but the format fits Brazil's culture of short, reusable voice effects passed from phone to phone. Users forward it as a quick punchline for tiredness, laziness or deep sleep, and creators later reused the same audio in memes and short video edits where an exaggerated snore was needed.