The true "London Bridge" occurs when two girls are being done doggy style, facing each other and making out while the two lucky men high five over them.
"London Bridge is falling down, falling down, falling down..." So many people get the Eiffel Tower and the London Bridge mixed up that they get caught up in the specifics and forget to sauce the girls.
by Brendan Butler April 20, 2006
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When your bra strap is falling down.
"I'm london bridging right now."

"I call my bra strap London Bridge because it's falling down."
by AnarchistOwl December 1, 2014
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A foursome involving 2 girls and 2 guys. The 2 girls are on all fours facing each other and making out. Meanwhile each guy is behind one of the girls doing her from behind.
While visiting London Bob and John saw the London bridge where they met 2 girls who showed them the REAL London Bridge.. behind closed Doors
by Cooter King November 2, 2006
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A sex position in which a woman bends over backwards while receiving vaginal intercourse and giving oral sex simultaneously.
1.) Kristina Krohn has seen many a London Bridge in her day.

2.) The woman was found weeping on the side of the road. The police suspect a London Bridge.
by Eileen Bakanswallow May 6, 2007
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When and girl gets eaten out by a British guy or girl causing her back to arch
This British guy William ate out Jade and gave her a London Bridge.
by Focacc fam August 25, 2015
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Similar to the Eiffel Tower but involving two guys and two girls. Each guy is doing each girl in the ass while the two girls are facing each other and are making out.
One time I saw a porno and it had the London Bridge
by AzzPounder May 28, 2010
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The gender role reversal of the Eiffel Tower. The man positions himself in a back bend stance between two women, the first of which stands over his groin to accept the penis, the second of which stands over his face to accept cunnilingus. The two women may then hold hands or high five to complete the top of the bridge. Also called the London Bridge because it is the Queen’s sex position.
Guy 1: dude my back hurts so bad from London Bridge-ing Jen and Ann this morning.
Guy 2: What’s a London Bridge?
Guy 1: It’s like an Eiffel Tower, but better.

Daniel London Bridged the fuck out of us yesterday, it was awesome. I hope Alec does it tonight.
by ZaddyZick69 April 2, 2018
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