(not) lose sleep over (something)

to not worry about something.

I don't intend to lose any sleep over this problem.

• in the market for something
• in the meantime
• in the meanwhile
• in the medium term
• in the middle of
• in the middle of doing something
• in the middle of nowhere
• in the middle of something
• in the midst of
• in the midst of doing something
• in the midst of something
• in the money
• in the name of
• in the name of something
• in the neighborhood of
• in the neighborhood of something
• in the nick of time
• in the offing
• in the open
• in theory
• in the palm of hand
• in the palm of your hand
• in the picture
• in the pink
• in the pink of