1. Someone that always exhibits an attitude of fun and excitement in what he/she is doing. This person often is the life of the party and invited to events just because friends/acquaintances know they will have more fun if he/she is there.
2. Person lacking of standard excuses for not having fun or going out, such as: "i'm tired", "I have to get up early", "I have my kid tonight", "My spouse said i can't go out", "I drank too much last night"
Bachelor: Can we go home now I have a wedding in the morning.
Best man: NO! You had better change your funitude right now or no more dances for you!
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 majorcase of fattitude."
Laura Bush: How was your lunch, dear?
GWB: It was the best Tex-mex I had in a while. The refried beans were outta this world. I must have had three servings!
Laura Bush: here are some beanos for you darling. We'll be spending the afternoon with the Putins, you know...
GWB: You take me for an old fart? dont need them beanos!
Laura Bush: I admire your fartitude, Mr President