It doesn't have to necessarily be in the physical ball form
or a midget but what would seem like an angry little bastard who reeks of rage and uncontrollable annoying anger.
Giant guy sitting at bar: I am going to ask you nicely to please be quiet, sir.
Sid: Aww girly panties not pulled up? waah waah
I'm gonna head butt your abdomen and use it as my pillow!
Giant guy sitting at bar: Well, I think we need to take this outside because you're being a huge Angry ball of asshole.