1: Bun (adj.) - ugly, unattractive
2: Anorexic (adj.) - suffering from anorexia, an eating disorder
Bunorexic is where somebody has become so skinny that they are now unpleasant to look at. Can also be used in a wider sense to describe anything unpleasant.
2: Someone's pissed on the floor, that's so bunorexic!