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

1.
是...的死因, 使...烦恼不已
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.
所有这些压力都将要了我的命。
•
His constant complaining will be the death of me.
他不停的抱怨会要了我的命。