from The Century Dictionary.
- noun One who drives in the stragglers of a herd of cattle.
Sorry, no etymologies found.
The drag-driver directed Goodheart to the left point.
A Man Four-Square William MacLeod Raine 1912
Though Yeager had enjoyed immensely his month with the Lunar people, he tasted again the dust of the drag-driver with a keen pleasure.
Steve Yeager William MacLeod Raine 1912
Once when I was drag-driver of a herd in a round-up .... "
The Highgrader William MacLeod Raine 1912