What do you mean by wearing a blue hat?

The expression of wearing a blue hat is mainly used for criticism and accusation, which usually means that someone has done something incorrect or misbehaved. This expression usually has nothing to do with wearing a hat, but a metaphor that someone's behavior will get him into trouble.

For example, if a person is not serious and responsible at work, he will be called a person wearing a blue hat, because such behavior will make his future work and life more difficult. In addition, in love life, if a person betrays his partner, he will also be labeled as a police tactical unit, which means that his behavior not only violates moral norms, but also makes him feel lonely.

But the metaphor of wearing a blue hat is more used for some simple and interesting things. For example, if someone wants to show that he is in a good mood, he can say, "I wore a police tactical unit to work today." This expression can not only express his happiness, but also be humorous and interesting, making people around him laugh. In a word, wearing a blue hat is a very interesting and ironic rhetorical device in daily life.