Someone, usually a gay man, who loudly acts stereotypically gayer (feigning a slight lisp, limping wrists, gushing over Lady GaGa, etc.) than he or she normally would act in order to get attention.
Like a flamboyant robot whose rainbow circuits only activate when certain people are looking, Percy is such a flambot!
"You usually pride yourself on passing for straight, but whenever we go to a bar with your girl friends, you suddenly start squealing about how FAAABulous Britney Spears is. Man, you're such a flambot."
Someone who acts gay (or gayer) for some specific purpose. Commonly done to get attention, special treatment, or (in the case of straight men) access to woman-dominated locations and activities. Shortened form of fabrigay egg.
See also: flambot, flambiguous, fauxmosexual
"At home you act like a Will, but whenever we go out, you act like a Jack! God, you're such a fabrigay egg."
"LiLo, diving with Samantha Ronson didn't make you relevant again. Can you please stop being such a fabrigay now?"