What is Incompetent Boob?
1.
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.
See
