kiss of death
指的是让某件事失败的因素
You know Mom always goes along with Dad's decisions. If she approaches Dad on my behalf that would be the kiss of death to my trip.
你知道妈总是同意爸爸的决定的。要是妈为了我去跟爸爸说，那我的这次旅行就算完了。
go along with  赞同 附和

to kiss someone or something goodbye
意思是"拒绝或放弃某人或某样东西"
If you leave your camera on a park bench, you can kiss it goodbye.
如果你把照相机忘在公园的长椅上，就别抱希望找到