22
one or more listed below
1. someone who is fat
2. someone who eats a lot
3. someone who is lazy
4. someone who is greedy, especially when it comes to food

u know.... a fatass
oh my god jack, you ate the food you fatass
by aznfatass May 31, 2007
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23
The act of eating a lot more food than everyone else in the group, causing everyone to call that person fatass.
Little Jimmy had three bags of candy and a large soda at the movie theater, so everyone, including his parents called him a fatass.

10 years later, Little Jimmy entered a middle school hot dog eating contest. Little Jimmy gobbled up record high 676 weenies, shattering previous record of 325 set by Michael Moore and tied by Rosie O'Donnell. Everyone, including the president of hot dog eating contests, called Little Johnny a fatass.

Another 10 years later, Little Jimmy finally moved into his own apartment where no one could judge his eating habits. Little Jimmy ate 62 big macs to celebrate. Despite dying of a clogged anus the next morning, nobody was around to call Little Jimmy a fatass, so technically he was not a fatass.
by susepenederes December 24, 2009
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24
Nearly half of the people in America. Maybe more.
Dude that guy's a fatass.
by sXe vGe April 29, 2010
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25
a FAT ASS is a voluptuous female butt that brings many men (mainly black guys) pleasure to the eye. It is often very round and large in size.
Man, Kim Kardashian has a FAT ASS!
by booty master2395748 March 17, 2014
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26
An insult given to only the fattest people who deserve it most.
If you are so fat you can't see your toes if your able to look down, then you're a fatass.
by skinnydipp34 January 15, 2012
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27
Kim Kardashian.
Eric Cartman.
Any person with a large unattractive rear end.
A painfully honest description of an oversized butt.
Not quite wide load, but getting close.
Kim Kardashian's fat ass has gotten so huge!
by jsd96321 January 13, 2012
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28
one who must wear thongs because their GINORMOUS bottom does not fit in regular underwear
Since my locker is near the english office, my fatass english teacher can hear everything I say. i.e., "I've had sex in the shower five times!"
by WOOPSIE March 30, 2004
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