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German Kaiser who defeated the invading Filipinos in the War of 1469. Katzbach is credited with the invention of the 'Jackhammer' sex technique and famously used the technique on all 102 of his female servants within a 4 hour period.
Guy 1: "Did you get with that girl last night dude?"

Guy 2: "Yeah, we rocked the Katzbach all night long"

Guy 1: "What's the Katzbach?"

Guy 2: "Its the 'Jackhammer'"
by JKCUA92 February 12, 2011
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