Noob spelled backwards.
Although it does not mean the opposite of 'Noob', it has to do with the same idea. While a noob is someone lacking experience, therefore tey are rather terrible at whatever it may be, a boon is somebody with experience but for whatever reason, they are just as bad. A boon plays at the skill level of a noob but they do't have an excuse because they have experience in the field they are performing in.
Although it does not mean the opposite of 'Noob', it has to do with the same idea. While a noob is someone lacking experience, therefore tey are rather terrible at whatever it may be, a boon is somebody with experience but for whatever reason, they are just as bad. A boon plays at the skill level of a noob but they do't have an excuse because they have experience in the field they are performing in.
Mike: John, you're such a boon.
John: What are you talking about? I just started playing.
Mike: You've been playing for 2 years and you are still terrible!
John: What are you talking about? I just started playing.
Mike: You've been playing for 2 years and you are still terrible!
by Mr. Robinson's Neighborhood April 08, 2007