A person/thing that ebodies the quintessential hater spirit. He/She/It shoots down your dreams and aspirations, and on a smaller levels, your ideas and attitudes because they are not happy with themselves.
Jim: I just got a promotion! I will be making $15,000 more a year and my wife and I will finally be able to buy that new house.
John: Yea but you're still a slave to the man
Jim: Dude, you're a Hater Deluxe