Slang for one's ear, when it is recieving a masssive load from the pure excellence of the sound of a musician/band.
Tenacious D will cum in your earpussy.
Broken down into "shit janitor", as in one who is positioned to clean up the shit that has hit the fan resulting from a fight/or series of dramas. In other words, a problem solver or a mediator for a group.
Hannah volunteered to act as the shanitor for the situation.