Derogatory word for an immature fan of science fiction, or sci-fi. A science fiction fan who doesn't have a realistic attitude toward the genre, but thinks that science fiction is the be-all ad end-all of his/her life.
Look at that skiffy over there with the Spock ears. Let's hit him with the Shrek slime!
A saying or word used when someone dress or acts like a huge slut. This can include wearing minimal or no clothes, always having boobs hanging out, and acting like a slut. Also known as the opposite of classy.
"So are we gonna dress skiffy for the party tonight?"
or "That girl was all over 5 guys at once, she was being such a skiffy"