The act of being at work and having your daily bathroom stall that you found to be the most comfortable being used by someone else, around the same time you MUST get in there.
John: " I need to go to the bath room."
Shaun: " Then Go "
John: " I can't, My stall I use is being used by someone else, and it also keeps happening lately"
Shaun: "Is it the same person"
Shaun: "You've been shitterrobbed"