Top Definition
Extreme arm pit perspiration where even prescription deodorant and antiperspirant won't stop the relentless flow of sweat from pouring out, resembling a mighty river.
Person 1
"Oh my God! Look at his gigantic pit stains!" Did someone spray his under arms with a hose?"
Person 2
"No, he just has a bad case of river pits."
by Spencer-C9 January 06, 2008
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