A girl who has serious bladder control issues, and on one occasion has been known to piss on her own tits after falling in a bathroom. She also regularly pisses herself in public places.
A person is added to the scale to allow for a more graphic explaination.
His pisstistity level was like a 5. He would have given Shane Mcgowan a run for his money. We had to take the the bottleoff him before he broke it over his bosses head.