Idioms for swearing include:

1. Shameless: Yan: face. Refers to a person who is thick-skinned and shameless.

2. Duplicity: Used to describe people with bad intentions who do one thing in front of others and another behind their backs.

3. Human face and animal heart: Although the appearance is human, the heart is as fierce as a beast; it is described as a cruel and despicable person.

4. Benefit yourself at the expense of others: harm others; benefit yourself. Profit: to gain benefit.

5. Ghosts: originally ghosts in ancient legends, later referring to various bad guys.

6. Xiaodujichang: often used to scold people who are small-minded and only consider small things and do not take into account the overall situation.

7. Not recognizing relatives: It describes someone who does not respect family relations, is unreasonable, and does not care about relatives. Sometimes it also means being unkind to anyone.

8. Unload the mill and kill the donkey: After finishing grinding things, unload the donkey and kill it. It's a metaphor for kicking away people who have done something for you.

9. Black sheep: A bad horse that harms the herd is a metaphor for a person who harms society or the collective.

10. Pretending: To deliberately put on an accent and a posture, used as a metaphor for deliberately artificiality.

11. Losing one's mind, losing one's mind, as if going crazy. Describes words and deeds that are confused and absurd, or cruel and abominable to the extreme.

12. Wolf ambition: Wolf son: Wolf cub. Although the wolf cub is young, it has a vicious nature. It is a metaphor for violent people with vicious intentions and hard-to-change habits.

13. Wine sack and rice sack: only know how to eat and drink, but not do anything. It is often used to ridicule incompetent people.

14. Eat the inside out: accept the benefits of one aspect but work hard for that aspect. Usually used to curse traitors.

15. Harm to heaven and harm to principles: injury, harm: damage; heaven: way of heaven; principles: ethics. Describes doing things that are vicious and cruel and unscrupulous.