gǒu​gǎi​bù​liǎo​chī​shǐ

bad habits are hard to change

狗改不了吃屎 gǒu​gǎi​bù​liǎo​chī​shǐ
bad habits are hard to change
literally meaning a dog cannot stop himself from eating excrement; used to describe a person who is stuck in their ways or unable to change their deep-seated bad habits

Frequency

Written text
0.288 per million

Sources

Frequency data
BCC Corpus (BLCU)