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A fattock is a rotund, larger friend within a social group that always eats too much and often orders the most food when eating out etc.
Simon: Marc, why have you ordered SO much food... it's 10am?
Marc: *insubordinate yelping and denial*
Simon: You're such a fucking fattock.
Fattock by mumpaidforthis August 19, 2014
1. a potluck composed entirely of fatty, greasy foods.
2. a person who opportunes company potlucks in the hope of scavenging food to appease thier never-ending hunger
Cheryl is the team fatluck. Anytime there's food, she's there!
fatluck by rick328i May 21, 2008

Fatfuckinator 

Any large burger containing multiple beef patties, bacon strips, and excessive amounts of cheese, ie, Wendy's Baconator, Burger King's Triple Stacker, Rally's/Checkers' Double Big Buford, and pretty much any Hardees Burger. Guaranteed to make you a FAT FUCK, hence the name!
Hey bro, how about a Fatfuckinator? No? Really man? Ok bro, that's cool.
Fatfuckinator by Roland Daggett November 10, 2007
a person who is REALLY REALLY fat. Like, incredibly fat. Their boobs (or moobs) are the size of mountains.
Herman is one fatfuck.
fatfuck by wowser77 October 7, 2009

Fattocks 

The buttocks of a grossly obese individual. Most often a ghastly and unnerving sight to behold
Crikey me! Look at the fattocks on that Mc Donalds addict!
Fattocks by [Harry^Hardcore) July 19, 2007
A person wose belly folds over his or her pants.
Mike hoffer,Ed Grabinski, Mark(shitdick) Gustiduas
fatfuck by Mark Lankowski September 17, 2003