The unconfortable itchy feeling in the anus usually after a terrible wiping experience
Brock: So how'd that deuce go?
Pierce: Awful, it was one of those craps that took 150 wipes. My anus will be itching in no time
Brock: That sucks, your gonna get butt rot
When you have been sat down for too long and your arse starts to feel numb/sore
I've been sitting down for 10 hours straight and I have a serious case of Butt rot :/