In the German Nazi SS an Obergruppenführer was a high ranking general. It also translates from German to mean "upper group leader". In general an orbergruppenführer is a despot boss who makes peoples' lives miserable.
The obergruppenführer boss at work made everybody work over the weekend.
The lowest job in most organizations and is usually assigned to a newbie or someone so useless nobody knows what to do with. Mentioned several times in King of the Hill and at Strickland Propane the job was to wipe the propane tanks to prevent the sun from heating them up. But still not demeaning as a butt wipe.
The boss' girlfriend was just sitting around doing her nails so we assigned her as a tank wipe .