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1.) a concentrated collage of personal effects found to be sexually stimulating to the viewer; intended to be viewed during masturbation.

2.) a tool primarily used for bringing oneself to orgasm; a fake vagina
1.) "I was able to fit pictures of a nude midget, my half-naked ex-girlfriend, and 4 black guys pounding one white girl in this sweet jacksterpiece last night. My wrist STILL hurts!"

2.) "Alright, well, I'm gonna stop off at the sex toy shop and pick up a jacksterpiece on my way home. I totally ripped my last one."
by fffreddy August 12, 2010
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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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