C-DIFF. If you've ever dealt with someone whos had it you know the smell. It's undescribable but instantly recognizable and stick in your nose for days.
Dude for real. Once I had the unpleasant experience of a plug popping out a little too quickly and drenching me with it. It is the most foul, awful, stench.
Came here to say this. I'm able to easily handle much of the gross side of medicine/care, but that smell sticks with you. First time I was assigned a patient with c-diff I went in thinking I was prepared. Such arrogance...