Also - my halloween outfit criteria:
1) Be as comfortable as possible
2) Try to look like something that 'slutty teacher', 'slutty schoolgirl', 'slutty vampire' would WANT to hook up with
3) Buy as little as possible, and what you do buy - be able to rock in normal circumstances if possible.
For several years I would rock a Velour Adidas Track Suit and be K-Fed, A Lazy Gangster, etc.
This year - while I can't seem to find the letterman jacket, I just cut the hair and intend to buy a Big Gulp cup.