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a) Noun: Kossu is usually refered to as a big ugly thing. b) Verb: Kossu(ing) - Being an ass hole or being ugly or dumb. Its background is Finnish, usually people refer themselves as Kossu as being cool, but due to recent translations it actualy means the above. The people who are called Kossu are generally fat, losers who like Star Wars and think they are cool by being Racist.
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