1. Exclamation used to indicate disgust in one's excessively lazy lifestyle.
2. Adjective used to describe a person who is habitually excessive, particularly in relation to food and drink, but also in relation to drugs, lethargy, and general sloth.
"Don't get to close to Vincent's flabnasty mom. She'll chew your arm off! Flabnasty!"
This guy I know. He called himself the Flabbinator coz he thinks he's a super fat super hero. I'd just go with it if I were you...
"Ordinarily, he is Fewis Loulds, but when the Fat Signal shines in the sky, he becomes; The Flabbinator! Protecting the city from criminals and salads alike!"