Something so phenomenal that neither fabulous or fantastic would suffice to describe it. This is no doubt a word that will be readily adopted by the gay community and people who say chillax.
"Oh my god, Billy! That newscarf you're wearing is just fabulastic!"
Fabulantastic N. fab.u.lant.astic Property of Diane's word. It means fabulous in more cooler way. Warning:
no parents should use this word..cush it's weerd for them.