Top Definition
Anal sex, or back door entry.
"Man, I was knockin poop all night with that slut, Nick. He answered his back door with some shit that got all over my dick"

"Did you guys get the poop knock on last night?"
#poop #knock #anal sex #gay sex #butt sex #shit pushed in
dari Aaron and Jacob Sabtu, 15 Maret 2008
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