1 definition by Darnell Williams
A London Bridge occurs when two guys are standing up naked and a girl is giving them blowjobs at the same time, alternating back and forth between the two erect penises. The two guys standing up represent the brick foundations of the acutal London Bridge. The erect penises being held by the female are connected when she holds them and alternates blowjobs, similar to how the real London Bridge's brick foundations are connected by a road. This also alludes to the Fergie song, which I may add, hints at this fantasy of many. Oh snap!
London Bridge is falling down when the guys can't last any longer. Better keep that dual connection going, in hopes that the bridge doesn't fall down and everyone gets some!
by Darnell Williams August 27, 2006