Fictional Fans

I like that, but it does put at minimum pretty much all science fiction and fantasy under fanfic. And it also doesn't include RPF unless you say a life is a work by a creator, in which case nearly all fiction ever is fanfic.

(That's not necessarily wrong though, the original definition of fanfic back before Star Trek was something like "fiction created as a hobby by a fan" and included a ton of original sff.)