láng xīn gǒu fèi: 狼心狗肺 - Cruel, Heartless, Ingrate

• Keywords: lang xin gou fei, 狼心狗肺 meaning, Chinese idiom for heartless, cruel and unscrupulous, brutal and cold-blooded in Chinese, ungrateful person in Chinese, wolf heart dog lungs, Chinese chengyu, Chinese idiom for betrayal.
• Summary: The Chinese idiom 狼心狗肺 (láng xīn gǒu fèi), literally “wolf heart, dog lungs,” is a powerful and visceral insult used to describe someone who is utterly heartless, cruel, and unscrupulously treacherous. It paints a picture of a person who lacks basic human decency and repays kindness with savage betrayal. This term is reserved for condemning serious acts of cruelty or ingratitude, making it one of the stronger condemnations in the Chinese language.

• Pinyin (with tone marks): láng xīn gǒu fèi
• Part of Speech: Chengyu (成语) / Idiom (used as an adjective or predicate)
• HSK Level: N/A
• Concise Definition: To be as cruel as a wolf and as savage as a dog; utterly heartless, brutal, and without conscience.
• In a Nutshell: This idiom describes a person who is not just mean, but fundamentally inhuman in their cruelty and ingratitude. By saying someone has the internal organs of a wolf and a dog, you are implying they have replaced their human conscience and empathy with animalistic savagery. It is used to express profound disgust and moral condemnation, especially towards someone who has committed a heinous act or betrayed deep trust.

• 狼 (láng): Wolf. In traditional Chinese culture, the wolf is a symbol of greed, ferocity, and untamed cruelty.
• 心 (xīn): Heart. Metaphorically, the heart is the center of one's conscience, empathy, and morality.
• 狗 (gǒu): Dog. While modern culture loves dogs as pets, in classical Chinese idioms, dogs often represent something base, lowly, or lacking dignity.
• 肺 (fèi): Lungs. In this context, lungs, like the heart, represent a person's inner essence and constitution.

The characters combine to create a powerful image: a person whose innermost being—their “heart and lungs”—is not human but is instead made of the cruel, savage parts of wild animals. This signifies a complete and horrifying lack of gratitude, morality, and human feeling.

• This idiom is deeply rooted in a traditional agrarian worldview where certain animals embodied specific negative traits. The wolf (狼) was a direct threat to livestock and a symbol of viciousness, while the dog (狗) was often seen as an unclean scavenger, despite its role as a guard animal.
• Comparison to Western Concepts: An English speaker might use phrases like “heart of stone,” “cold-blooded,” or “a monster.” However, `狼心狗肺` is more visceral and condemning.
  • “Heart of stone” implies a lack of emotion. `狼心狗肺` implies the presence of active, malicious cruelty.
  • “Cold-blooded” describes a calculated lack of empathy, often in the context of a crime. `狼心狗肺` carries a stronger connotation of ingratitude and betrayal. A person who harms a benefactor is the quintessential example of `狼心狗肺`.
• Related Values: The severity of this insult highlights the profound importance of gratitude (感恩), loyalty (忠诚), and basic human decency (仁) in Chinese culture. To be accused of being `狼心狗肺` is to be accused of fundamentally violating the moral fabric of society.

• Connotation: Extremely negative and insulting. This is not a term to be used lightly. It is a harsh character assassination reserved for situations of profound moral outrage.
• Formality: It is almost always used in informal, emotionally charged contexts. You might hear it shouted during a heated argument, used in angry gossip, or written in dramatic film/TV show dialogue. It also appears in news headlines to describe particularly heinous criminals, like those who abuse children or murder their benefactors.
• Common Situations:
  • Describing a criminal who committed a brutal crime.
  • Condemning an adult child who abandons or mistreats their elderly parents.
  • Accusing a business partner or friend who committed a deep and damaging betrayal.
  • Characterizing a historical villain or a corrupt official who preyed on the people.

• Example 1:
  • 他竟然为了钱出卖了帮助他多年的朋友，真是狼心狗肺！
  • Pinyin: Tā jìngrán wèile qián chūmài le bāngzhù tā duōnián de péngyǒu, zhēnshi láng xīn gǒu fèi!
  • English: He actually sold out a friend who had helped him for years just for money. He's truly heartless and ungrateful!
  • Analysis: This is a classic usage, highlighting betrayal and ingratitude. The use of `竟然 (jìngrán)` emphasizes the shocking nature of the act.
• Example 2:
  • 那个男人抛弃了病重的妻子和孩子，简直是狼心狗肺的东西。
  • Pinyin: Nàge nánrén pāoqì le bìngzhòng de qīzi hé háizi, jiǎnzhí shì láng xīn gǒu fèi de dōngxi.
  • English: That man abandoned his critically ill wife and kids; he's simply a brutal, inhuman creature.
  • Analysis: Here, `狼心狗肺` is used to describe an act of extreme cruelty and irresponsibility. Calling someone a `东西 (dōngxi)` or “thing” after the idiom further dehumanizes them.
• Example 3:
  • 你这个狼心狗肺的叛徒！我当初真是瞎了眼才会相信你！
  • Pinyin: Nǐ zhège láng xīn gǒu fèi de pàntú! Wǒ dāngchū zhēnshi xiāle yǎn cái huì xiāngxìn nǐ!
  • English: You heartless traitor! I must have been blind to ever trust you!
  • Analysis: A direct and angry accusation, likely shouted at the person. This shows the term used in direct confrontation.
• Example 4:
  • 新闻里报道的那个罪犯，手段极其残忍，所有人都骂他狼心狗肺。
  • Pinyin: Xīnwén lǐ bàodào de nàge zuìfàn, shǒuduàn jíqí cánrěn, suǒyǒu rén dōu mà tā láng xīn gǒu fèi.
  • English: The criminal reported in the news used extremely cruel methods; everyone is cursing him for being a heartless monster.
  • Analysis: This shows how the term is used by the public or media to condemn heinous criminals.
• Example 5:
  • 我把他当亲兄弟，他却偷走了我全部的积蓄，这种狼心狗肺的行为让我怎么原谅？
  • Pinyin: Wǒ bǎ tā dāng qīn xiōngdì, tā què tōu zǒu le wǒ quánbù de jīxù, zhè zhǒng láng xīn gǒu fèi de xíngwéi ràng wǒ zěnme yuánliàng?
  • English: I treated him like a blood brother, but he stole all my savings. How can I forgive this kind of brutal and treacherous behavior?
  • Analysis: The sentence structure contrasts deep trust (“treated him like a brother”) with vile betrayal, making `狼心狗肺` the perfect descriptor for the action (`行为`).
• Example 6:
  • 养了你这么多年，你竟然这样对我们，你还有没有良心？你这个狼心狗肺！
  • Pinyin: Yǎngle nǐ zhème duō nián, nǐ jìngrán zhèyàng duì wǒmen, nǐ hái yǒu méiyǒu liángxīn? Nǐ zhège láng xīn gǒu fèi!
  • English: After raising you for so many years, you treat us like this? Do you have any conscience? You ungrateful monster!
  • Analysis: A typical line an aggrieved parent might say to an unfilial child, connecting ingratitude directly to the idiom.
• Example 7:
  • 历史上的那些贪官污吏，压榨百姓，无恶不作，个个都是狼心狗肺。
  • Pinyin: Lìshǐ shàng de nàxiē tānguān wūlì, yāzhà bǎixìng, wú è bù zuò, gègè dōu shì láng xīn gǒu fèi.
  • English: Those corrupt officials in history exploited the common people and committed all kinds of evil; every single one of them was cruel and unscrupulous.
  • Analysis: This demonstrates the use of the idiom to describe historical figures or groups known for their cruelty.
• Example 8:
  • 不要再为他求情了，一个能对自己的救命恩人下毒手的人，就是狼心狗肺，不值得同情。
  • Pinyin: Búyào zài wèi tā qiúqíng le, yíge néng duì zìjǐ de jiùmìng ēnrén xià dúshǒu de rén, jiùshì láng xīn gǒu fèi, bù zhídé tóngqíng.
  • English: Stop pleading for him. A person who can fatally harm their own savior is simply a heartless monster, unworthy of sympathy.
  • Analysis: This example clearly defines the term by providing a perfect scenario: harming a `救命恩人` (jiùmìng ēnrén), or one's savior.
• Example 9:
  • 当初我们那么困难的时候他袖手旁观，现在我们成功了，他又想来分一杯羹，真是狼心狗肺。
  • Pinyin: Dāngchū wǒmen nàme kùnnán de shíhòu tā xiùshǒupángguān, xiànzài wǒmen chénggōng le, tā yòu xiǎng lái fēn yì bēi gēng, zhēnshi láng xīn gǒu fèi.
  • English: Back when we were struggling, he just stood by and did nothing. Now that we're successful, he wants to come and get a piece of the pie. He's truly shameless and unscrupulous.
  • Analysis: While not about direct harm, this usage applies to extreme selfishness and a treacherous lack of loyalty. The “betrayal” is one of inaction and opportunism.
• Example 10:
  • 难道你看不出来吗？他做的那些事，哪一件不是狼心狗肺？
  • Pinyin: Nándào nǐ kàn bù chūlái ma? Tā zuò de nàxiē shì, nǎ yí jiàn búshì láng xīn gǒu fèi?
  • English: Can't you see it? Of all the things he has done, which one wasn't completely heartless and cruel?
  • Analysis: A rhetorical question used to persuade someone of a third party's evil nature.

• Underestimating Its Strength: The most common mistake for learners is to treat `狼心狗肺` like a simple insult such as “jerk” or “asshole.” It is far more severe. Using it in a casual disagreement would be shocking and inappropriate. Reserve it for genuine, deep-seated moral condemnation.
• Incorrect Context: Do not use this for minor annoyances. Someone cutting you in line is rude (`没礼貌`), not `狼心狗肺`. Someone who lies about something small is a liar (`骗子`), not `狼心狗肺`. The term requires an element of profound cruelty, betrayal, or ingratitude.
• “False Friend” Warning: While it translates to “heartless” or “cruel,” it's not a perfect match. The English terms can sometimes describe a general disposition. `狼心狗肺` is almost always used in reaction to a specific, despicable action that reveals the person's true, monstrous nature. The element of betraying kindness is often central to `狼心狗肺` in a way that isn't always present in “cruel.”

• 忘恩负义 (wàng ēn fù yì) - To forget kindness and betray trust. A synonym that focuses specifically on the act of ingratitude. `狼心狗肺` describes the evil nature of the person, while this describes the act itself.
• 丧心病狂 (sàng xīn bìng kuáng) - Literally “to lose one's heart and go mad.” Describes someone who is frenzied, deranged, and has lost all sense of morality. It's similar in strength but emphasizes madness and irrationality more than cruelty.
• 白眼狼 (bái yǎn láng) - “White-eyed wolf.” A colloquial term for an ungrateful person who turns against their benefactor. It's a very close concept, but `狼心狗肺` is a more formal and powerful four-character idiom.
• 蛇蝎心肠 (shé xiē xīn cháng) - “Snake and scorpion heart.” Describes a person, often a woman, who is venomous, cruel, and vicious in their intentions. Similar to `狼心狗肺` but uses different animal imagery.
• 铁石心肠 (tiě shí xīn cháng) - “Heart of iron and stone.” This is closer to the English “heart of stone,” describing someone who is stern, unfeeling, and not easily moved by emotion. It is less about active cruelty and more about emotional coldness.
• 感恩图报 (gǎn ēn tú bào) - An antonym. To feel grateful for a kindness and actively seek to repay it. This is the ideal moral behavior that a `狼心狗肺` person violates.
• 宅心仁厚 (zhái xīn rén hòu) - An antonym. To have a kind, benevolent, and magnanimous heart. Describes someone of great moral character.