露出马脚

Traditional (Taiwan): 露出馬腳

lùchūmǎjiǎo ㄌㄨˋ ㄔㄨ ㄇㄚˇ ㄐㄧㄠˇ

    • to reveal the cloven foot (idiom) to unmask one's true nature
    • to give the game away

Character by character

Sources