A Hung is a type of person who loves to discuss, but they have such a low level of cleverness that they always seems stupid or retarded. Their disscusions often takes place on the internet on forums or usually in a private chat service such as Skype. Even though they fail miserably time and time again, they keep discussing, because they don't have the level of smartness to realise that they are never right.
The word can also be used as a verb, "Hunging" which means that you are discussing on the same level as a Hung.
The "Hung" likes to discuss football on skype, but he doesn't know anything about football.
He sucks at discussing, he is "hunging"!