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Definitions by WellFuckYouToo

Fattus Maximus 

One who is massively overweight and uses gym equipment to watch Netflix on the treadmill.

Also sits around and eats KFC all day.
Dude 1:Dude, did you hear that the Reddit user u/GherkinP is a fattus maximus?
Dude 2: yeah, I heard he uses the treadmill to just watch Netflix.
Fattus Maximus by WellFuckYouToo December 9, 2019