fanfiction

noun
  1. 1

    Amateur fiction created by fans, incorporating the characters and concepts of a commercial media property, typically without permission from the author or owner.

  2. 2

    A work of fan fiction.

  3. 3

    Fiction about fans and fandom created by members of fandom.

Synonyms

Source: https://en.wiktionary.org/wiki/fan%20fiction, https://en.wiktionary.org/wiki/fanfiction