whirling down the shitbowl

Going to pot, going to hell in a handbasket; a way of saying that a situation or a person's condition is deteriorating extremely rapidly.

Mom's mind is whirling down the shitbowl; she always forgets to take her meds, she lies in bed naked all day, she has poopinary and pissinary incontinence, she won't even get up to get a glass of water.