Put it at the end of a chat screenshot edit, after the question appears on screen, as the final reply. Start with the WhatsApp message sound to set up the chat, then let this clip answer, and follow it with Olha a Mensagem for a second nudge.
Über diesen Sound
This is a short 2.6-second Brazilian Portuguese voice clip saying 'Não sei, não sou carteiro,' which means 'I don't know, I'm not a postman.' The wording turns a simple refusal into a blunt, funny shrug, giving the listener a quick, awkward laugh when a question has no easy answer.