Rambo amigo re caro circulates as a Brazilian Portuguese WhatsApp audio, the kind of short voice note that gets forwarded from chat to chat because it is easy to reuse. The phrase mixes a familiar nickname with informal slang for very expensive, giving it the feel of an inside joke between friends rather than a line from a film or show. Its short length and clear punchline have helped it survive as a reaction sound, especially in conversations about money, shopping, and prices, where a quick spoken joke works better than a longer explanation.