To go into a restaurant, museum, store, someones house, zoo, aquarium, or other public place, take a shit, and walk out with out paying.
Person 1: I have to shit.
Person 2: Lets go in this restaurant.
Person 1: We cant go in there I dont have money for food.
Person 2: Dont worry about it just shit and dash.
Person 1: Good idea.
The sudden dash to the toilet before you shit everywhere! This can usually be after a heavy night of drinking and your 'beeriod' takes you by surprise or it can be caused by not pooping for a few days then all of a sudden BAMpoo dash.