1 definition by jburns1204

A male or female who is in the class of gargantuan size due to the mass consumption of McDonald's.

A male or female who consumes more McDonald's then he/she consumes oxygen.

Copyright: Joseph M Burns
Man that chick over there just downed 5 BigMacs, she's a real McFatty.

That dude comes in 3 times a day, 7 days a week. Doesn't he have a life? What a McFatty!

Joe has his girlfriend Carmen, who works at McDonald's bring him mass amounts of food after every shift, he's a McFatty.

Bailee did not copyright the word McFatty. Joe did!
by jburns1204 July 27, 2015
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