Injure someone physically or emotionally. For example, The bullet skimmed his shoulder and barely drew any blood, or That reviewer really knows how to draw blood. This term alludes to drawing blood for diagnostic purposes.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.