A degree of fatness. Wubbity is one level of fat below being chubby and one above being sexy. Wubbity is comfortable, classy and confident. Anyone who is Wubbity has most likely been in better shape, but can still exert themselves physically the same.
Corey is not fat or out of shape he is just Wubbity.
Q: Wow Wubbs are you going to eat all of that?
A: Why yes of course. I'm trying to maintain my Wubbity, loving appearance.
Warning to all people who are Wubbity: Stay away from Swamp Donkeys