Top definition
A word compounding two seemingly unrelated words (River & Chub) in order to establish a person as being a fat, repugnant and all around worthless individual who is a far better use for society if burrowed into the side of a muddy river bank.
Kevin: Hey Tyler, what were you doing last night?

Tyler: Its not what I was doing its who and it was Jennifer!

Kevin: That Riverchub?
by Joey Teeter December 10, 2008
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