A term used mainly to describe elderly people, though it can be a catch-all term, too, describing anyone who's past their prime. It's used especially by pessimists as they get further into their 40s and 50s.
In the movie "On Golden Pond," Katherine Hepburn addressed Henry Fonda as "you old poop."
A term used to define the instance where a person has clogged the toilet, but chooses to remain anonymous and blame it on others.
Upon returning home from work, I found the toilet clogged. None of my roommates took the blame and had claimed it to be the Jerry which was not around to defend himself. Ergo, The Old Fashioned Poop and Run