dog robber
n.β Β«Another assignment was to be a βdog robberβ which was a military term for a general aide to a superior officer who could be called upon to do a multitude of things.Β» ββColumnist salutes World War II veterans for dedicated service” Observer (Dunkirk, New York) Nov. 11, 2007. (source: Double-Tongued Dictionary)
Could this be “dogsbody”?