The phrase comes from Ipiranga, one of Brazil's best-known petrol station brands, whose advertising made 'Pergunta lá no Posto Ipiranga' a household catchphrase. Rather than giving a straight answer, the line redirects the question to the petrol station, which is exactly why it caught on as a joke. It later spread through Brazilian social media, meme pages and WhatsApp audio forwards, where it became a ready-made reply to curious, awkward or intrusive questions. Its staying power comes from that simple setup: everyone recognises the dodge, even without any extra context.