(1) An early abbreviation of science fiction, still used by the popular press, but strongly out of favour with fans. (2) Bad sf, especially of the Bug-Eyed Monster variety.
Widely used shortening of the term Science Fiction. A genre of story which, at its best, uses up to date scientific development and theory to create speculative fiction and, at its worse, provides lazy excuses for contrived, big budget, effects heavy Hollywood movies. PBR