Someone who keeps tabs on the latest fashion trends and rocks out the look in public.
I ran out and bought a bathing suit after seeing what Hally Berry wore in the Bond flick "Die Another Day" so I can look as Fashiontabulous as her on the beach.
Something amazing, marvelous, fashionable, fantastic, or fabulous, but ten times better.
"Woah! That movie was great!"
"Yeah, it should win an Oscar it was so fashiontabulous!"