When two quadruple amputees, strapped to skateboards have sex.
The Annual Amputee Orgy/Tent Revival ended in a Double Quad-Roller Bumpin' Grind under the pulpit.
by Super Guatemala Man February 19, 2008
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When inconspicuously grinding with four (or more) people at one point in time.
i once got Quad grinded when IN SLATINGTON( they're all bitches and who'es)
i was thrown into a clusterfuck of sluts.
by dr duche bag josh November 19, 2008
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