funtastic in English dictionary funtastic Meanings and definitions of "funtastic" (nonstandard) Fantastically fun. adjective (nonstandard) Fantastically fun. more Grammar and declension of funtastic funtastic ( comparative more funtastic, superlative most funtastic) funtastic (comparative more funtastic, superlative most funtastic) more Sample sentences with "funtastic" Declension Stem Try again Authors