What does elder brother mean when he says younger brother is stupid?

Brother's saying that brother is "stupid" may have many meanings, depending on the context and the speaker's intention

1, joke or ridicule: Sometimes, brothers and sisters will joke or ridicule each other with some light words. In this case, "stupid" may be just a kind of intimate title, and there is no malice.

2. Well-intentioned criticism: If the younger brother thinks that his younger brother is not smart or mature enough in some aspects, he may use the word "stupid" to express his worries or expectations. In this case, the elder brother may want the younger brother to be smarter and more mature.

3. Malicious attack: However, if the elder brother attacks the younger brother with the word "stupid", it may be unfriendly behavior. In this case, the elder brother may be dissatisfied or hostile to the younger brother.