As an engineer at sea I've had a few bad jobs. Climbing inside boilers or diesels is always hot and you get burned not to mention oily or sooty. I once told my Petty Officer to flush the sewage pumps on a cruise ship with fresh water right at the start of a watch, four hours later at the end of a watch he came in to the control room: "Sir, eh sorry but I forgot to turn the fresh water flush off the sewage pump." I ran down to the engine room to find the ten cubic metre tank spraying raw sewage out of every seal at 116 psi! We laughed to be honest and with a karcher HP washer it was cleaned up pretty quick. The absolute worst job though is anything to do with the food waste system on a cruise ship. Sewage is one thing but I have yet to meet anyone who can smell the slightest whiff of pulped food waste in bulk and not instantly throw up. I've even seen grown tough guys having a full on tantrum when tasked to just open a tank up. It has to be done in full chemical suit with full fire fighting breathing apparatus so as you're isolated from the stink. Even now it gives me nightmares a decade later.
