floor hopper 

An individual, usually in a multi-floor office building, who is so ashamed of the smell of his or her own poop that they will not crap in the restroom on their floor, but instead, take the elevator or stairs up or down to crap in a more inconspicuous location where they will not be noticed or recognized.

Dude, Jim's shit is so rank he goes to the fifth floor restroom.
He is such a floor hopper.

floor hopper by fro12 April 23, 2006