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it's a past-tense verb. this occurs when you are fucking a girl from behind you actually take a shit and bust a nut at the same time. this usually occurs as an accident, but those who are extra freaky my try to do it.

this takes the wet spot to a whole new level.
for those that try to do it and know it's coming, they can always exclaim to their sexual partner, "baby, i'm about to shit nut" or when they finish, they can say, "oooo i shit nutted"...
by fireball roberts September 14, 2007