A sexual act in which two people are bent over side by side while each of such people are being penetrated from behind.
Dude, those chicks get parallelepiped!
by NerdizzleNoob August 18, 2021
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The sexual act of double penetration wherein the penetrating phalluses extend in the same direction.
Dude, we parallelepiped that chick for hours!
by NerdizzleNoob August 18, 2021
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