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When somone texts you to give them pornstar worthy pictures. Something Matt does alot.
Matt so was porn texting me the other night!

So I think I am going to porn text her later.
by Jill and Bethany January 06, 2008
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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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