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A loud mouth who never stops talking and smells like old mac and cheese. People hate them and would rather get hit by a truck than be near one.
My cousin is a Macaroni Muncher. He talks nonstop and smells like a dumpster fire.
She walked into the room and immediately became a Macaroni Muncher. No one wanted to be near her.
My teacher called me a Macaroni Muncher because I kept talking during lunch.