4. Donut Head Homer (The Simpsons)
From the fourth classic Treehouse of Horror episode where Homer sells his soul for a donut but is later returned his soul by a devil version of Ned Flanders (another potential costume idea) as long as Homer has his head turned into a donut, this would be an instantly recognizable and crowd pleasing costume... especially if you were to paint you arms a bright yellow and wear Homers classic white shirt and blue trousers. This costume might look like a tricky task to pull off, especially within just two days, but there are multiple and easy ways you could do this. If you really aren't into putting that much effort into costumes, at the very least you could by a big piece of cardboard, cut it out in the shape of a donut (with the signature bite taking out of it of course) , stick it to your head and paint it and your face orange. If this one doesn't do it for you but you like The Simpsons... Google the Treehouse of Horror episodes for lots and lots of inspiration for costumes... For example, you could create a Mr Burns head out of papier-mache or cardboard and and attach it to your neck (like Homer has in Treehouse of Horror 2) or alternatively you could dress up as Bart's alter ego superhero Bartman.