Top Definition
1. To eat excessively over time to a point where one becomes overweight or obese; process in which one becomes a fatass.

2. To eat an excessive amount of unhealthy food at one given time.
1. "I totally fatassified myself by having donuts for each meal for the last 4 years."

2. "Dude, you're fatassifying yourself by eating all those pancake batter and maple syrup dipped sticks of butter."
by ubererror7 April 30, 2009

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