1 definition by A Loyal Theorist

Matpat is a diet coke addict who did in someway get his youtube channel ( The Game Theorist) famous. He does livestreams on youtube with his wife steph. He even has a cat called Catpat and he is the only reason anyone watches the livestreams. Matpat is a real nerd.
Whos that youtuber that talk about videogames in a nerdy way and drinks diet coke?

It's Matpat.
by A Loyal Theorist June 2, 2016
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