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The Iron Butt is a large device, used as a replacement of one's butt. It is a large gray and dark blue machine with many wires, gears, pipes, lights, and other things sticking out of it. Concept-wise, it is a machine that doctors use in Bikini Bottom if a patient's butt is severely injured. The Iron Butt is a parody of a device called the "Iron Lung," which was used for breathing problems because of Polio and Botulism.
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