the final nail in the coffin
US /ðə ˈfaɪnl neɪl ɪn ðə ˈkɔfɪn/
UK /ðə ˈfaɪnl neɪl ɪn ðə ˈkɔfɪn/

1.
最後一根稻草, 致命一擊
an event that causes the failure of something that had already been weakening
:
•
The company's latest scandal was the final nail in the coffin for its reputation.
公司最新的醜聞是其聲譽的最後一根稻草。
•
His decision to quit was the final nail in the coffin for the struggling project.
他辭職的決定是這個陷入困境的項目的最後一根稻草。