It can be anything, it can be used whenever and it can be used as a noun or adjective or a verb.
"The weather is poo!"
Someone that is scared to do something or is annoying
Johno:im not tryna tadeho kobe challenge
Warnie: boi u have to poos
the brown soft messy stuff that comes out of your butthole
i just went poo in the big ass mother fucking toilet while jacking off
A brown consistency that come out of your bum hole: you can get it in;
Sloppy
Rocky
Chunky
Liquid
And more
Son: Mom i did a poo
Mom: oh it’s a mixture of liquid and rocky
it smells
me:'hey did you poop yourself?'
friend:'noooo...'
thinking me:sus
Poo is what comes out of your asshole it's just like shit that's because it is shit. Poo is brown and smells disgusting
Poo is shit