Obnageous
Someone who acts like they’re the king of the world and is completely nuts. It’s like being attacked by a loud, crazy, smelly person.
My cousin tried to sing at the family dinner. He was obnageous.
My friend’s dog bit the postman and howled at the moon. He was obnageous.
My teacher’s friend screamed at the principal and threw a pencil. He was obnageous.