Shee Shee on the Wall
It means he won't do that again. An activity done by some disobedient rabbits.
Josh: Once my rabbit pooped on the floor. Once he even shee sheed on the wall
Sam: What does shee shee on the wall mean?
Josh: It means he won't do that again
Sam: What does shee shee on the wall mean?
Josh: It means he won't do that again