'fantabolous' means they are both fantastic and fabulous put together, so who ever is called this is really really really coool :) like probs coolest in the world?
Frantabulous is a mix of Fabulous and Fantastic. A girl named Fran made the word fantabulous into her own by adding an r. FRANtabulous. People use it to refer to things that are fashionable and cool. Instead of saying fabulous and fantastic, you say Frantabulous.
Sort of like "fabulous" but much more fabulous than the word "fabulous" can convey. Like supercalifragilisticexpialidocius but shorter and easier to spell.
While on a free trip to Italy I won a free titanium frame bicycle and the customs agent let me bring it on the plane for free. What a Fantabulous trip!