A Port-a-Potty, or potable toilet. Insert a friend's name within the brackets for a cheap funny insult.
Hey guys, I got to take a leak. I'm gonna hit that port-a-Justin over there.

The Oktoberfest at Sierra Nevada Brewery must've had at least 80 port-a-name (pronounced "port-a-Brians")!
by eleventhtoe October 22, 2011
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