murder on

be murder on (someone or something)

To cause a lot of harm, distress, or ill effects to someone or something. Staring at this computer screen all day has really been murder on my eyes! I just think working in the evenings and having to get up with the kids in the morning is going to be murder you.
See also: murder, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

murder on something

very destructive or harmful to something. Running a marathon is murder on your knees. This dry weather is murder on my crops.
See also: murder, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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