noun
the practice of reading a person's character or future from the lines on their buttocks
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Rumpology is a pseudoscience that claims to predict a person's future by reading the lines, moles, and shape of their buttocks.
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I can't believe people actually believe in rumpology as a legitimate way to predict the future.
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Some people think rumpology is just a load of crap.
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In a figurative sense, rumpology can be seen as a way to analyze someone's character based on their actions and behaviors.