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A man, usually old, who wears tight shirts, sweats profusely, and sticks out his stomach in such a way that his outie belly button presses up against the cloth. Mc'loobs often tend to be teachers. Basically, an all around LRB.
"Did you see that nasty ass Mc'loob?"
"Yea, that's why I vomited."
by Purtypilot July 17, 2006
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