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1.
A synonym for the words damn, mess, fuck, unbelievable, etc... Used off and on as an interjection for decades with its first use on the internet verified as no later than 1/5/2000. This word has been around for decades but never heavily used.
If it's not broken don't Kafuck with it. Or "I saw Paris Kafuck with yet another Newbie on usenet." A variant is "Perhaps you can explain to us the significance of the 3rd derivative,
Kafuck-head?"
by thorongil March 14, 2010