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

1.
결정타, 마지막 못
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.
회사의 최근 스캔들은 명성에 결정타였다.
•
His decision to quit was the final nail in the coffin for the struggling project.
그의 사임 결정은 어려움을 겪던 프로젝트에 결정타였다.