Top definition
Someone you had sex with in the past.
I ran into a smash from the past the other day, I can't believe I got that wasted!
by nigguhnoodle January 02, 2011
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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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