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 toclose to Vincent's flabnasty mom. She'll chew your arm off! Flabnasty!"
1. Oprah was utterly flabbygasted when her husband timidly told her she had "put on a few".
2. When Britney got on the scales after a night of cheesecake and prawns, she was well and truly flabbygasted.