Top definition
Adj; A male who has a tendency to place his genitalia in unusual places.
Last night some guy got his junk stuck in one of the jacuzzi jets, what a penis prober.
by scorepex June 14, 2007
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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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