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A third (fourth,... ect.) boob that cannot even lactate that exists just for fun.
Or
A humorous insult used to describe a bumbling idiot with a big smile on his face.
someone who insists that global warming is a hoax. (Whether we are causing it or not, it's still there.)
You may call that person an incompetent boob.

by Michael Conner April 30, 2008
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