Adjective
fictiony (comparative more fictiony, superlative most fictiony)
(informal, rare) Of, pertaining to, or characteristic of fiction.
We have to realize that the way of thinking that got us to this place no longer holds. We have to rethink elements as basic as space and time, to go all science fictiony [sic] on you in this sense. Justin Trudeau
I started out writing much more science fictiony stuff and writing about science fiction. Neil Gaiman