Expression of disbelief or approval, depending upon the circumstance. Used in place of "damn," but for humorous or witty effect, as it plays upon the actor's famous name.

One can further elaborate with "Jean Claude van DAAYAM!"
Guy 1: I just won a hundred bucks from the lottery!

Guy 2, who is a bit clever: Jean Claude van DAMN!
by el materdor December 24, 2008
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Interjection
Something becomes Jean-Claude Van Damn-like when it is both kick-ass and extremely outdated.
Eduardo: Remember Last Action Hero and Over The Top? Jean-Claude Van Damn!
by trueconnerite98 April 12, 2013
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