maghanap ng salita, tulad ng the eiffel tower:
 
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?"
ayon kay Aaron and Jacob ika-15 ng Marso, 2008