be murder on (someone or something)(redirected from are 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.
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.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.