blow cover
露出真面目、揭穿、暴露或泄露隱藏的秘密或真相
口語·用于秘密行動或隱瞞身份的場景
英文釋義
to reveal or expose one's true identity or intentions
例句
The spy's disguise was perfect until a phone call blew his cover during the mission.
典故來源
源自間諜或特工術(shù)語，指隱藏身份被意外暴露，如同偽裝被風(fēng)吹開一樣。