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1.
An individual who overcompensates for having small gentles by purchasing Volkswagens and going to many country music concerts.
(John) Look at that tool in the GTI bumpin country music....(Jason) That has to be The NUB!!!!
by PLAB May 02, 2010
 
2.
a sort of filler word for "for sure!" or "right on!"

follows words like wicked, sweet, cool, ace, etc.
"that shirt is sweet, man. the nub."
by anonymous January 16, 2004