run one ragged
Exhaust one, as in I've run myself ragged with this project. This idiom alludes to working so hard that one's appearance is reduced to rags. [c. 1920]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.