What does "兄者など" mean? I read a doujinshi about an older brother who was teased by his younger brother, and the younger brother said "". I don't really get what it means. Someone please help me ;__;

It means "such a brother", or "like this type of brother(if that's what the context meant). It seems to like :" such a (bad/good/handsome etc.) brother" -elder brother -nature/type -alike