Pooh Sauna 

A pooh sauna is created when someone first visits the toilet for a rather pungent smelling deposit, and then activates and uses the shower. As a result, the pungent smell is heated by the steam from the shower, thus creating a 'pooh sauna' for the next unfortunate entrant to the bathroom.

Jesus mate you've just created a horiffic pooh sauna in there!

Pooh Sauna by mallen1977 January 11, 2013

Poohsagna 

To make repeated bowel movements in the same bowl without flushing; separating each movement with a layer of toilet paper. Can be made solo over a period of days or with friends (minute or fresh poohsagna).

I came home and found the fellas had made me a fresh bowl of poohsagna

Poohsagna by The Real Slappy White February 6, 2009

poosauna 

taking a shit in a port-a-john when its hot as frothy balls outside

dont go in the poosauna if you can stand the heat

poosauna by mbigpoppa August 30, 2007