Top Definition
A reference to the bodybuilder Mike Katz, of Pumping Iron, known for his almost anti social work ethic, which he credits for his success.
To katz, or kazting, is the act of choosing to train or workout when other peers might be partying, dancing, or drinking, often at night.
to katz: "Yeah, we could've tried to bang some sloots at that party, we decided to hit the gym and katz it all night instead."
by thadcastle69 October 05, 2013

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