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

1.
是...的死因, 使...煩惱不已
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.
所有這些壓力都將要了我的命。
•
His constant complaining will be the death of me.
他不停的抱怨會要了我的命。