Jacketinal
A jacketinal is something that will stab you, punch you, or shoot you with poison just for fun. It might be an animal, a person, or something that looks like a vegetable but has a grudge against you.
My dad is a jacketinal. He hit me with a hammer and said, ‘You’re not getting a video game.’
That dragon in the game is a jacketinal. It spits fire and laughs at me.
That jellyfish in the ocean is a jacketinal. It stung me and said, ‘That’s for being annoying.’