Ψάξε όποια λέξη θες, όπως fluffer:
 
1.
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?"
από Aaron and Jacob 15 Μάρτιος 2008