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When you have a bowel movement followed by a shower, the smell combines with the steam creating a poo sauna.
"I didn't want to shit and then shower and create a poo sauna"
by MrMojoRisin March 20, 2006
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
by mbigpoppa August 23, 2007