The first is that the plural of Science Fiction Fan is "FEN." At one time it was common to use "fenne" for lady fen, I don't think that's in use anymore.
It may not be any less, either, I don't know, as Mrs. Drang and I have gaffiated.
s*i*g*h. "GAFIATE": From GAFIA, "Get Away From It All." In the novel Fallen Angels Niven, Pournelle, and Flynn introduced "FAFIA", "Forced Away From It All", for those who had to hide their interest in geekish activities due to the anti-science-and-technology bent of society in that book.
And yes, fen are big on wordplay, like "it may not be any less...", or the propensity to coin acronyms.
FILK: "Folk music for folk who ain't been born yet." The story goes that, at an early con, there was a folk singing session on the program, with a typo someone felt compelled to explain away with a new definition. Wordplay, see?
TRUFAN: Goes to all the cons, has all the autographs, knows all the trivia. If old enough, was probably instrumental in getting Sharyn McCrumb declared "The Salman Rushdie of fandom" for her murder mystery Bimbos Of The Death Sun. Probably someone for whom Fandom Is A Way Of life, or
FIAWOL: See TRUFAN.
ZINE: You probably know this is short for ""magazine", but fen--mostly trufen--were putting out zines on mimeograph machines decades before Al Gore invented the intenet. And using acronyms and emoticons ("smilies.") FanFic? Fannish zines.
I guess we really have gafiated: Now that I think of it, until yesterday, I hadn't really used much if any fanspeak since I started writing this thing four and a half years ago. We've tentatively planned to de-gafiate a couple of times, but work or money got in the way.