狗改不了吃屎 [－－－－－－]

Jyutping gau2 goi2 bat1 liu5 hek3 si2
Pinyin gǒu gǎi bù liǎo chī shǐ

Definitions (CC-CEDICT)
  1. lit. a dog can't stop himself from eating shit (idiom)
  2. fig. bad habits are hard to change
Definitions (Wiktionary)
  1. proverb, derogatory, figuratively, idiomatic
    a leopard cannot change its spots (said of bad habits or traits)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    俗话说：浪子回头金不换；可俗话又说：狗改不了吃屎！
    俗話說：浪子回頭金不換；可俗話又說：狗改不了吃屎！
    sú huà shuō ： làng zǐ huí tóu jīn bù huàn ； kě sú huà yòu shuō ： gǒu gǎi bù liǎo chī shǐ ！
    • The saying goes: to turn a new leaf is priceless. The saying also goes: a dog can't change their habits of eating shit!