To me, a brother is someone who is violent, bad tempered, and unintelligent.
They will stab you in the back, stab you with a screw-driver, throw heavy metal objects at you, spread false rumours, chase after you with handfulls of knives, and keep a collection of weapons in the house.
My brother beat the crap out of me, threatened me with knives, tried to kill me, and then told everyone that I was the one who did all of that to him. What an asshole
There was nothing I could do about it.