k-type
A k-type is a human-shaped weapon who enjoys giving people the worst kind of pain and will happily kill you if you look at them wrong.
My cousin is a k-type. He once beat up a guy for stealing his sandwich.
That teacher is a k-type. She failed me for no reason.
My dad is a k-type. He screamed at me for 10 minutes because I spilled soda on his shoes.