The phrase combines the Portuguese greeting for good night with carniça, a word for carrion, turning a polite farewell into a deliberately rude joke. Short clips like this tend to circulate as reaction audio in Brazilian meme culture, where a familiar spoken line is lifted, shared in chats and reused over unrelated videos. Its appeal is not a story or a famous scene, but recognition: viewers who know the expression instantly understand the tone, and creators reuse it whenever a sweet sign-off needs an unexpected, mocking twist.