露狐狸尾巴

lòuhúliwěiba ㄌㄡˋ ㄏㄨˊ ˙ㄌㄧ ㄨㄟˇ ˙ㄅㄚ

    • to reveal one's true, wicked nature
    • to show one's true colours

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
show the fox's tail
Meaning
A bad person reveals their true, wicked nature. Critical. Similar to 'show one's true colours'.

Sources