Top Definition
1- One who is quite large in body mass and volume like a tank; they will be able to eat more than most people.

2- One who has eaten more than his or her share of food, and should be reprimanded.
Josh ate three footlong subway sandwiches, what a fatank.
#fat #tank #fatank #dummyface #fatass #fatty #fatso #obese
by Joshua Trbovich February 01, 2007
7 Words related to Fatank
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