láng​xīn​gǒu​fèi

cruel and unscrupulous

Senses

狼心狗肺 láng​xīn​gǒu​fèi cruel and unscrupulous

literally "heart of a wolf and lungs of a dog"; describes a person who is cruel, savage, or completely lacks a conscience; can also describe someone who is deeply ungrateful

References

synonym 蛇蝎心肠/蛇蠍心腸 狼心狗肺/狼心狗肺