lose sleep over

1. Worry about, as in It's too bad the experiment failed, but I'm not going to lose sleep over it. This expression, often put negatively, alludes to actual insomnia caused by anxiety. [First half of 1900s]

Related Words

• agonize 
• bother 
• brood 
• carp 
• chafe 
• fume 
• fuss 
• grieve