What is "fanspeak"

n. (context informal English) The jargon spoken by science fiction fans.

Fanspeak is the slang or jargon current in science fiction and fantasy fandom, especially those terms in use among readers and writers of science fiction fanzines.

Fanspeak is made up of acronyms, blended words, obscure in-jokes, puns, coinages from science fiction novels or films, and archaic or standard English words used in specific ways relevant or amusing to the science fiction community.