be the death of
US /bi ðə dɛθ ʌv/
UK /bi ðə dɛθ ʌv/

1.
être la mort de, être la perte de
to cause someone to die, or to cause someone a lot of trouble or worry
:
•
All this stress is going to be the death of me.
Tout ce stress va être ma perte.
•
His constant complaining will be the death of me.
Ses plaintes constantes vont être ma perte.