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Knickerbocker: A whore's powered wagon that delivers traitors and betrayers to Dante's 9th circle of hell. Also known as Cocytus, this is the lowest circle of Hell and is dedicated to treachery, specifically betrayal, and is a frozen wasteland where the worst sinners, including Satan, are punished. In slang terms, "Knickerbocker" is used to describe a person who will pretend to be a friend for the purpose of getting the opportunity to sleep with your girlfriend or wife. A Knickerbocker will go as far as roofying the males at a party or social gathering for the opportunity to get one on one time with his target female.
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