The act of hiding a bowl of feces in an unsuspecting victim's abode. Usually well-concealed to prevent discovery until the stench is unbearable. Extra points for hiding places that are above eye-level, as the victim will most likely reach into the bowl without seeing what is in it and pull back a shit-covered hand.
Bob was talking shit about my mom, so last night, I shit bowled that ass hole. I put it in a closet on top of the water heater so it will get extra hot and smelly.
A shitbowl is just a vulgar slang term for a toilet
Clean the shitbowl!!!