Place it immediately after the prying question in your edit, then follow the dismissal with Damn Meme for a sharper reaction, or open with No No Wait Wait before it when you want the exchange to build before the shutdown.
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This is a short spoken Portuguese line, Cuida da Sua Vida, telling someone to take care of their own life, delivered with a firm, unimpressed tone over about six and a half seconds. It lands as a sassy, funny shutdown, the kind of reply that turns an awkward prying comment into a laugh while making the boundary clear.