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When one uses both feet to pleasure a girl, Like riding a bike, One foot in the vagina, one foot in the anus. and continue pedaling motion.

Similar - Double Fisting.
I double fisted her with ease, so we decided to step it up a notch and started bicycling the hell outta that bitch.
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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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