over my dead body idiom
只要我还有一口气就不能那样做；除非我死了
If you say something will happen over your dead body, you mean that you will do everything you can to prevent it.
"Joe says he's going to buy a motorbike." "Over my dead body!" “乔说他想买辆摩托车。”“只要我还有一口气就不准他买！”