Someone you know of but never meet who causes money to be charged to you surprisingly and unnecessarily so their identity can be kept a mystery. Often like someone who comes up and pinches you from behind (both of which is surprising and unnecessary.) This is often a way for the middle man to make money off of both parties.
I'm tired of using a middle man. My lawyer needs to give me the number of this ass pincher so we can meet personally and avoid any other charges due to miscommunication.