They just go on shitting up the world and feel no responsibility for their character or anything they do.

To entice the screw into the best position to be shitted up the trick was to ask them to open a door on the landing. Keith was in his cell, conned the screw to the top of the stairs and whooshhhhhh!!!

Her roommate Eerie had a panic attack while using the bathroom and shitted up their entire cell/living area screaming "Nina is trying to kill me with voodoo devil worshiping shit" until she was removed and sent to some upstate nut house joint immediately.

Shit up

Meaning

Verb