* wear grey comfy clothing, pref. sweats if available
* purchase a bag of poly-fill (used to stuff pillows and
dolls) and two cans of silly string
* using yarn or string (of whatever the hell you want)
attach the poly-fill all over your body in random locations, the messier the
better.
* have friend help you spray yourself with silly string,
amount doesn't matter
* you have the option of adding small scraps of grey cloth
(or dirt, if you prefer to be realistic) to your ensemble
* face paint is totally optional
* you are now dressed as "belly button lint"