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Being of a plagaristic nature. To claim authorship (especially Copyright) of a work. Particularly applicable to a person who refutes the claim of plagarism in the face of undeniable evidence.
Adam: I totally made up Superman dude!

Steve: You seriously didn't man. You weren't even born when Superman was created!

Adam: I'm telling you, Superman was my idea!

Steve: You are such a f*cking Karl Thomas!
by Snoopy Kong February 19, 2010
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