Top Definition
The Gastro-intestinal system, where food is converted into into energy and waste products are formed the excreted from the body in large brown/tan masses.
I have been eating that activa yogurt stuff to try and regulate my dookie tubes, every time I am on the toilet I just explode mush and bits of undigested food.
by jose99 February 22, 2007
5 Words related to dookie tubes

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