Outsider fighting against social/corporate suffocation.
Search "Na Na Na trailer" on YouTube for the best definition/example.
2) someone who doesn't like happiness, laughter or fun especially when the person is not involved/invited and comes in to ruin it.
2) Whenever we are laughing, joking or playing a fun game, it bugs jim's father so much that he runs downstairs and ruins it for us. tsk, tsk...such a killjoy.