Have a denim or blue collared shirt? And what about a red bandanna? Throw your hair up and put on some red lipstick and you easily have yourself a great costume.
Men: go grab a roll of brawny paper towels from the store and pull out that red button down out of the closet. Easy peasy!
Everyone has a white t-shirt, right? Do you have a white apron too? Be Flo from the Progressive commercials :)
Light powder, red lipstick, and black eye make up is all you need to be a mime. Put your hair in a bun. A black hat, white gloves, and black and white striped shirt would complete the costume but not necessary.
Pregnant? This idea comes from CarolinaCharm. If you have some black fabric scraps laying around you could easily put this together in less than 10 minutes!