掛羊頭賣狗肉

英文：sail under false colors (v.)

說明：colors 為美式英語的拼法，英式英語為 colours。這個字在此指的是船隻所掛的旗幟。

例句：

• A lot of politicians sail under false colors. (許多政客掛羊頭賣狗肉)
• That door-to-door sales rep was sailing under false colors and was actually a swindler. (那位挨家挨戶推銷的業務代表掛羊頭賣狗肉，他其實是個騙徒)