Very effective against; also, very fond of. For example, “He is a wonderful fielder and sure death on bunts” (Christy Mathewson, Pitching, 1912), or The boss is death on tardiness, or She's death on the latest fashions. [Slang; early 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.