haemophrenic
A person who thinks blood is the only thing that makes sense in life and would punch you for saying something stupid.
My cousin is haemophrenic. He threw a chair at me because I said pizza was better than burgers.
My teacher called me haemophrenic after I spilled ink on her desk and said I was sorry.
My dog is haemophrenic. He barked at the mailman and chased him halfway down the street.