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The aspect of a personal or professional relationship (particularly in government office) between a senior man and a younger woman that includes, but is not limited to, fellatio.
"We were emotionally close" - Bill Clinton (Forty-Second President of the United States, 1998)
by Rich Jackson February 15, 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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