A metal toilet such as that found in outhouses and other locations devoid of indoor plumbing. Often sprayed with shit.
Fuck man, did you smell the fuck-stench coming off of that piss tin?
by TresEquis April 08, 2004
Simply another name used for Bathroom
"Guys if we don't find a piss tin soon im guna piss myself."
by lauRgasm April 25, 2005