a naturally skinny guy with a high ass metabolism, who has abs, and claims he has worked for them when really it's just because he doesn't gain any weight; Fake ass abs.
The dude looked like an anorexic bitch when he tried to play off his Fabbs as abs.
That nigga claims he went to the gym when really it's just his Fabbs talking.
Fabushay (adjective): Meaning a largely intensified meaning of the word fabulous, generally used by gay men to state how amazingsomeone/something looks or is.
E.g. 1) Ed: Ohh myy god did you see Sam tonight? She looked fabushay!