Poop is a substance that comes out of your behind
It can be brown, red, yellow,
sometimes green. (Odd right?)
It can also be watery a.k.a diarrhea, which is
most of the time unpleasant.
There are different types of poop such as Number 1 Number 2 and Number 3.
The most easiest way to explain it is
the higher it is within these 3 numbers, the harder it is to poop it out.
There are more but those are the main ones that most people know.