Top Definition
often times defined as practicing Mixed Martial Arts with buddies, but usually a cover up to blow your some dude named Matt behind the gym.
Also refer to the word Jim time
Dan: hey brett what were you at the gym for four hours for?
Brett: ooo just lifting weights, cardio, and a little bit of "Matt work"
Dan: sounds pretty gross.
by cshmnymc January 14, 2011

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