mary pooppins
The act or process of taking such a large shit that you are forced to flush the toilet half way through your deification.
Properly used in a conversation:
Dude Number 1 "Dude, I took the gnarliest Mary Pooppins after eating all those burritos."
Dude Number 2 "Dude, I want burritos"
Dude Number 1 "Dude, I took the gnarliest Mary Pooppins after eating all those burritos."
Dude Number 2 "Dude, I want burritos"