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a person who is so cool they make your brain shut down
My cousin is a maddebil. He eats pizza for breakfast and still beats me in video games.
I saw a maddebil wearing socks with sandals and a crown. I asked him if he was a king. He said, 'I am.'
My teacher called me a maddebil because I solved the math test in 5 minutes and still drew a mustache on the principal's face.