When the girl sneakingly puts his dick in her asshole thinking that he's fucking her pussy
After we were done with the porn she told me that she performed a poop dupe on you.
by HandleBarJones July 28, 2017
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Basically when a chick is riding a guy and tells him that he's penetrating her puxXy but in reality she scoots down and inserts it in her ass without him knowing
But you said :" Ah it's my pussy it's my pussy" , but in reality we had anal!?

Her:I can't believe poop duping worked on you.
by ChibiEternity June 27, 2018
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When you 100% feel a poop coming on and you excuse yourself from an important task or meeting, only to be lied to by your asshole, turns out it was just some gas.
I missed a key issue when I got up from our national sales meeting only to be poop duped.
by KevinHughes21 September 3, 2016
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