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A device which implements a human being's rear-end to report a vehicle's performance in acceleration or engine power.
My butt-dyno says it's faster!
by Steve October 21, 2003
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May 7 Word of the Day
Paper product used as a barrier against unwanted messes, such as the liner at the bottom of a bird cage.
Please put a New York Times under that before it gets all over the place.
by Phaedrus331 February 12, 2021
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