You want your brother to keep your down jacket. In every family with brothers and sisters, brothers and sisters will quarrel or compete for toys. Of course, this is all in childhood. Therefore, every child will have the idea of wanting his brothers and sisters to disappear in childhood. As you get older, this subconscious idea will be suppressed.
Of course it will be shown in dreams. You want your brother to give you some down jacket, which is superficial. What you really want is that your brother is scolded by your parents for breaking your down jacket.