kiss of death

US /kɪs əv dɛθ/
UK /kɪs əv dɛθ/
"kiss of death" picture
1.

死亡之吻, 致命一擊

an action or event that causes something to fail or come to an end

:
The new policy was the kiss of death for the small business.
這項新政策是小企業的死亡之吻
His endorsement was the kiss of death for the struggling candidate.
他的支持對這位苦苦掙扎的候選人來說是死亡之吻