A person who seems to have a terrible outlook on life, and lacks optimism. Usually happens to be someone who has recently had someone wrong them in some way or another. In some occasions the "sadbor" is sad for no reason.
Gavin: All hail the magic sky wizard!
Ryan: Yes hail him!
Cole: I don't let idiots like you get to me.
Gavin: What are you doing Seth?
Seth: Making BEATS.
Gavin: Your beats suck.
Seth: Don't you EVER make fun of my BEATS!