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1.
A combination of "Fat" and "Attitude"; the loud, boisterous, obnoxious arrogance often displayed by large and/or obese women. This is very common; many large women often try to overshadow their physical enormity with a similarly large and over-exaggerated large-and-in-charge attitude.
"Dude, that blubbery fat chick needs to shut up already. She's got a major case of fattitude."
by Rob B. December 14, 2004
 
2.
An attitude to life which leads inevitably to morbid obesity.

A combination of severe laziness, arrogance and mental retardation which means the root cause of ones obesity will never be fully addressed or rectified.
Quote: "I can't eat fish unless it's battered and fried" "That's because you've got fattitude"

Weighing 300lbs and having the fattitude to telephone your non-obese partner to provide a beer delivery service direct to your sofa/bed, rather than get off your fat arse and risk burning calories.

Destroying several sofas by the sheer mass of ones arse and then blaming the manufacturer, rather than your own fattitude.
by Uberstench February 22, 2011
 
3.
fat chick(s) with an attitude.
Yeah, hyper's whole group suffers from fattitude.
by Dekkon October 24, 2003
 
4.
Someone who has a bad attitude mostly because they are overweight.
Hilda has a nasty fattitude befacause her ass is way too big.
by booboo 1971 August 01, 2009
 
5.
A fat chick throwing a lot of attitude, which makes you wonder why the hell are you at the receiving end, that too from a FAT chick.
Man, I'm having to put up with a lot of FATtitude these days.
by mayur June 06, 2006
 
6.
A fat overweight person who loves themselves but is grossly overweight with attitude but dosent have the right to be so.
Someone who likes to be over confident but really isn't and has fattitude
by MUCKSPREADER1 May 02, 2014
 
7.
when somone who is large or obese gives you attitude.

or a small or skinny person acts as though he/she is fat
courtny: is mouing down a big double cheese burgur meal.

jeb: man she's so skinny where does it all go.

carl: ya she definatley has a fattitude.

jeb: yesterday this fat chick was giving me fattitude.

carl: i hate that.
by tachison November 06, 2011