A shitsnesm is when one shits/sharts, while simultaneously having an orgasm and sneezing at the same time. It is a combination of relief, pain, and pleasure.
Dude, did you see the Shitsnesm John Alex performed this morning, it looked so painful!
A place you go to run like a rat on a treadmill in a room of mostly normies but the few hot bimbos you see are all glued to their fucking stupid headphones