1. The art of debugging a blank sheet of
paper (or, in these days of on-line editing, the art of debugging
an empty file). "Bloody instructions which, being taught, return
to plague their inventor" ("Macbeth", Act 1, Scene 7) 2. A
pastime similar to banging one's head against a wall, but with
fewer opportunities for reward. 3. The most fun you can have with
your clothes on. 4. The least fun you can have with your clothes
off.