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A need to poop that gives you a slight erection
Tim Kaye had a poop boner after his concert.
by TopeaseArlie July 21, 2006
When a male has to shit so bad he gains an erection. This happens when one holds their pooh too long, all the pooh pushes up against the prostate; which leads to an erection.
Dude, i got a massive poop boner right now.

This poop boner is wicked!
by Synthroid December 09, 2010