sail under false colours
披著偽裝行事;假裝是別人
書面/口語·指責(zé)欺騙行為
英文釋義
to pretend to be someone or something that one is not
例句
The company sailed under false colours, claiming to be eco-friendly.
典故來源
源自海盜歷史,船只掛假國旗欺騙敵人,比喻偽裝身份或意圖。