Dirty Drownie
The act of drowning someone in a toilet that has been used, specifically defecated in. The toilet is flushed after the victim no longer has a pulse.
I shat in the toilet and gave Patrick a dirty drownie. I left his body hanging by his throat on the seat of the toilet.
Drownies
That feeling you get after you take a huge bong hit and you feel like you're drowbing. You have a case of the drownies.
"I had a huge case of the drownies after that bong hit."