Obnoctoid
A person who is so annoying they probably have a nickname from the devil and a side job as a pain in the neck.
My brother is an obnoctoid. He eats my snacks like they’re his last meal.
My friend’s friend is an obnoctoid. He sings in the shower every day and doesn’t care if anyone hears him.
My dad is an obnoctoid. He talks about his job like it’s the only thing that matters in the world.