Perhaps the scariest creature from Aaahh!!! Real Monsters, you will bring back some major nostalgia with this costume.
What you need to do: For starters, dress in head-to-toe pink. If you don't have pink clothes, dye them in fabric dye. Wrap two tennis balls in white duct tape and use a Sharpie to draw on pupils. You can also use a Sharpie to draw a massive grin on your stomach. Use a brown marker or paint on cotton balls to achieve Krumm's signature armpit hair.