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To agree strongly, show excitment.
Thor: Hey man Christman nubs are annoying

Myles: Haha, amen brother!
by Myles Niemeyer January 09, 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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