狗嘴裏吐不出象牙
gǒu​zuǐ​li​tǔ​bù​chū​xiàng​yá

a filthy mouth cannot utter decent language

  1. 狗 gǒu noun
    dog
    dog; canines in general
  2. 嘴 zuǐ noun
    mouth
    mouth of a person or animal; beak, bill, or snout
  3. 里 裡 li locative
    in
    suffix used after nouns or time words to indicate location, time, or scope
  4. 吐 tǔ verb
    to spit
    to spit; to send out or release from the mouth; to stick out
  5. 不出 bù​chū
    not exceed
    to remain within a certain scope or range; to not go beyond a limit
  6. 象牙 xiàng​yá noun
    ivory
    elephant tusk; ivory as a material