Shit chauffeur

Also "Shit Showfer"

One who drives a party bus, late night taxi or Uber service, or designated driver for the evening. Often forced to manage or at least put up with inebriated drama.

"I had to buy a whole case of baking soda and Kleenex for my Shit Chauffeur job tonight hauling around a bachelorette party. I heard two of the bridesmaids used to go out with the groom; which should really make it a red letter night."