marshmallowectomy Posted in M Best definition marshmallowectomy The process of removing only the marshmallows out of cereal or other product with marshmallows mixed in with it. I looked over at my son eating his Lucky Charms. He had executed a perfect marshmallowectomy. How satisfied are you with the definition? Looking for marshmallowectomy meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 52 times.