Top Definition
The 'river' that starts in the gap between your pecs and runs down the gap between your abs. People with defined chests will brag that water can flow down it, much like a river. Usually called a Nile River because of the Nile's overall straightness.
I've been workin' out so hard lately I'm gettin a Nile River
by The Cuze April 05, 2010
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