Not sure if this will appeal to you, but just to recall the story makes me laugh...
Quite a few years ago in College, my flatmates and I went to a Halloween Costume Party. One of our friends stayed behind, as he couldn't think of a costume, but promised to show up later with a costume.
A little while later, he showed up at the party as "Chocolate Syrup Boy". He had stripped down to his boxers and covered himself from head-to-toe in Hersheys syrup. He was milling around our flat and found the syrup in our fridge.
Quite a few people got a kick out of it - we were laughing hysterically. One note of caution, however...the hosts of the party were not that pleased as he marred everything he touched with chocolately goodness.
Also, depending on your current hairstyle - you could try this:
At another Halloween party (many years later) a friend who had longish (6+inches) of straight hair, proceeded to shave the top of his head to the skin, cut the sides short, and leave a narrow strip of hair original length at the junction of the two. He was comb-over man. He would purposely get animated in discussion and his comb-over would flap all over the place. Bloody hilarious.
Finally, considering the trend around MR, you could always go as a pirate. ARRG.