Top definition
Paste that whitens your teeth.
Person: "I want to whiten my teeth using paste, so I think I will buy some whitening Toothpaste."
by Evil October 18, 2003
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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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