SMOF
SMOF (also spelled smof) is an acronym which stands for "Secret Master(s) Of Fandom" and is a term used within the science fiction fan community. Its coining is generally attributed to long-time science fiction fan and author Jack L. Chalker.
Capitalised meaning
The capitalised form of the term (SMOF) is used jokingly to refer to a clandestine cabal of top science fiction fans who, by their unseen influence, are controlling the actions of fandom. It is the SMOFs who are responsible for the trends and changes in the popularity of particular subgenres, media, or individual authors, films or television series. As such, this use of the term is a light-hearted conspiracy theory.
Uncapitalised meaning
The more general, uncapitalised, form of the term (smof) is an honorific bestowed upon the fans who actually do the organisational work behind much of fandom or are stalwart members of the fannish community. This includes fans who are regarded highly by others for their work in running conventions, fanzines, and fan funds, and who work (for the most part) on an entirely voluntary basis for the good of fandom in general, as well as those whose standing is high within the fannish community by dint of their long participation in it.