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-the seat for when someone takes a number 2 and there is no toilet-paper in the holder. This is one of the worst moments in a person's life for the already started pooing.
Bob: How was the bathroom?

Bill: Aw it was the worst. They stall ran out of toilet paper, so I was in the Devil's seat for 30 minutes until a maintenance man finally came in for more.
by Cpt. BOSS SAUCE February 29, 2012