A label applied to people who are more negative than positive when discussing another person. It most commonly refers to individuals whose negativity is so extreme that it is all-consuming. However, there are various levels and forms of being a hater, ranging from completely dismissing any positive traits or actions, to merely painting a less than flattering picture by using words with negative connotations. Hating is often attributed to jealousy, but just as often, it seems to stem from some other source.
Person A: Ben Gordon is one of the best clutch scorers in the league!
Person B: Gordon is an impressive scorer, but he's still a role player.