The act of inserting a fluffy sticky soft candy into the anus in any amount to be dissolved in the colon before anal sex/masturbation to purge the lower bowels of all fecal matter. After purged, it can be done again to fill the colon with a clear sticky fluid for the enjoyment of others. Marshmallows are a powerful laxative. Marshmallow stuffing should not be done by diabetics or anyone else concerned with blood sugar. Should be done in moderation to avoid pooping yourself at work.
When you are whispering the play by play from a Red Sox game to a naked girl while simultaneouslysprinkling Old Bay seasoning and drawn butter on her with the intention of giving her a Cleveland Steamer later.
Bill was getting excited thinking of a cape cod stuffie while spending time with his daughter's friend eating at the epic oyster