Costume Idea Zone.
Some highlights include:
White Trash: White sweatpants/sweatshirt with trash (i.e., milk cartons, paper, candy wrappers) stuck to clothes and hair. Or step into a white trash bag overflowing with trash.
Web Site: Drape fake spider webs all over your glasses.
Freudian Slip (variation): Girl - Wear a slip and attach notes from Freud (i.e., Ego, Id, Oral Fixation, etc.). Guy - Wear a bunch of slips of paper...or for the more daring, join the girls and wear a slip.
Peter Pan (variation): Wear green clothes. Put a pan on your head and a “Hello My Name Is Peter” sticker on your shirt.
Hairy Potter: Wear a huge wig, attach fake hair to your arms and legs. Carry around a bag full of pots and pans.
And there's plenty more where that came from.
If this shit passes for costumes, Least Creative People Ever is starting to look like a good idea.