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An unsightly, obese person with a propensity toward laying around and eating. Possesses a severe aversion to physical labor or exercise.
Adam: Is Ben playing basketball today? Charlie: No way, that fatbody is on his couch covered in potato chips and grease like he always is.
fatbody by Arulio December 30, 2007
"Blasco is such a fatbody."
fatbody by Dain Bramage February 8, 2003

disgusting fatbody 

A member of the military who is clearly too fat for effective performance. Originating from Stanley Kubric's "Full Metal Jacket".
"Are you allowed to eat jelly doughnuts, Private Pyle?"
"Sir, no sir!"
"And why not, Private Pyle?"
"Sir, because I'm too heavy, sir!"
"Because you are a disgusting fatbody, Private Pyle!"
disgusting fatbody by Lycomedes December 17, 2008

fatboy sse 

A fat nigga who loves food and when the delivery guy on time. Don't be fooled by his chubby teddy bear lookalike face he will steal yo girls pussy any day.
fatboy sse by Dankmemez454656 August 22, 2017

fatBoy Slim 

Right about now, funk so brother...
fatBoy Slim by Biafra J August 30, 2004

Fatboy Swap 

When you and another person order two different sandwiches and trade halves, giving both eaters the best of both worlds or simple variety. This can be done with other meals/food but a true Fatboy Swap is done with sandwiches.

Invented circa 2011 in Chelsea Market by Michael Hoey
Damn Big Ciel, I can't decide between the prosciutto or the sausage with broccoli rabe...Fatboy Swap?
Fatboy Swap by Tha Ho-Man January 17, 2019