will be the death of

(someone or something) will be the death of (one)

Said when someone or something is a source of extreme worry, distress, aggravation, or other effects too intense for one to endure. Next time, please call if you're going to be home late. You'll be the death of me with how much you make me worry! I swear, this project will be the death of us. We're working 80-hour weeks just to get it done before the deadline.
See also: death, of, will

be the death of (one)

To be a source of extreme worry, distress, aggravation, or other effects too intense for one to endure. You'll be the death of me! Please call if you're going to be home late, so I don't worry.
See also: death, of
Farlex Dictionary of Idioms.

will be the death of someone or something (yet)

[the thing named] will be the end or ruin of someone or something. This job will be the death of me! Rough roads will be the death of these tires.
See also: death, of, will
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone or something) is going to be the death of (one)
  • (someone or something) will be the death of (one)
  • be the death of
  • be the death of (one)
  • be the death of somebody
  • not stand the sight of (someone or something)
  • you'll be the death of me
  • the (absolute) limit
  • the limit
  • limit