fanon n. the body of widely accepted fan-created embellishments of a fictional universe, storyline, or character. Editorial Note: Thanks to Ruth Czirr for suggesting fanon as an entry. Etymological Note: fan + ca(n)on. The person quoted in the first 1998 citation has not been verified as the creator of the term fanon. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...
I find it highly appropriate that four of the five examples used are from four of the largest ‘fanon’ universes: Star Trek, The Sentinel, Harry Potter, and Stargate.