i know it's been over done but this was last years....
I have never seen that before....hysterical!!
Some dorky but no or low cost costumes...
Paint your eye black and put a large P on your shirt..."black eye pea"
Tape a leaf to your body when some ask what you are blow on the leaf "LEAF BLOWER"
Put a white trash bag over your body and write "WHITE" on the bag you are
"WHITE TRASH"