look up any word, like tbt:
 
1.
A medium pizza, rolled up and deep-fried. It is officially called a pizza roll. Usually ordered when intoxicated. The favorite food of drunk St. Lawrence University students. If eaten sober, the first few bites tend to taste quite delicious. The same can't be said about the last few bites. THE ultimate diet killer, hence the name "fatbag."
"I was so drunk last night, I called Sergi's and ate a whole fatbag by myself."
by Larry and Muffy March 11, 2006
 
2.
great big hoofin pair of titties
id love to stick my pingu in her fatbags
 
3.
Obese douchebag who likes to sniff his wife's feet.
Rex Ryan is the number one fat bag of all time.
by Julio's girl January 08, 2011
 
4.
bags o fat hanging from the elbows or knees, and in serious cases hanging from the chin
did you see her arms?

yeah she's got total fat bags
by strydy ho September 14, 2009
 
5.
(Noun, pl) Tits that are actually just bags of fat; they are totally shapeless, and can only be found on fat people. They frequently cause boner whiplash.
Susan: You have way bigger boobs than I do!
Mindy: No, your boobs are way bigger because they are not even boobs, they are fatbags.
by lechatquirit March 11, 2009
 
6.
breasts, boobs, tits, honkers, hooters, melons and shabadooo's
Guy 1: look at the fat bags on that one!!!
Guy 2: Very nice!!!
by wex November 02, 2003
 
7.
A bag from a large fast food chain.
Katie had many fat bags in the back of her car.
by Tmeow March 24, 2014