屁股不乾淨

Simplified: 屁股不干净

pìgubùgānjìng ㄆㄧˋ ˙ㄍㄨ ㄅㄨˋ ㄍㄢ ㄐㄧㄥˋ

    • to have skeletons in the closet
    • to have a shady past

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

May offend: vulgar language

Literally
one's backside is not clean
Meaning
Someone has something shameful or improper in their past that could come out, such as corruption. Informal and critical; close to "have skeletons in the closet."

Sources