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A second side of man's psyche, a literal dark side of the mind.
"...he's gone reverand, just plain reverand..."
by Reverand October 17, 2007
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Jul 29 Word of the Day
Someone who used to be a potential girlfriend/boyfriend, but no longer is.
Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...
by brownsuite September 24, 2011
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