A classification of poo into 7 different categories...
It was developed by K W Heaton at the University of Bristol.

The types of poos (1-7) on the chart go from hard stools, and hard to pass (constipation), to watery stools and easy to pass (diarrhea).
I have a Bristol Stool chart in my shitter so I can see what kind of stool I passed!! today was a type 7!! very urgent and I needed to go and it was like a water fountain!!
by castanza August 28, 2007
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