1 definition by scoreshack

In a foursome with two girls and two guys: During penetration, the girl is facing forward and the guy is holding her up by her legs and her feet are off of the ground, and another couple is doing the same facing you. The two girls lean forward and brace their hands against each other creating a peak, forming the shape of a bridge.
My buddy and I are trying to London Bridge these two slams.
by scoreshack March 12, 2015
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