mad shitter
In the army, a Mad Shitter is a total freak who craps in crazy places to scare people or make them sick. They don’t care if you eat it or drink it.
He crapped in the water tank. Now the whole platoon is probably gonna get sick.
He crapped on the top of my helmet. I looked like a monster.
He crapped in my sleeping bag. I had to sleep in a pile of poop.