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When a male and female are participating in sexual activities and performing the Stand and Carry (man stands while he holds the women up and carries here). The female loses grasp of the male or he lets go of her accidentally, his penis is still lodged in her vagina as she falls to the floor. The erect penis is hard and with all of the women's weight going down, the only thing the penis can do is snap. Thus, resembling London Bridge Falling Down.
Bridget- " I'm losing my grasp"

Tim- " SHIT!"

CRACK!!!!

Tim- "AHHHHHHH!!"

Bridget- "Ah shit man, your cock is snapped in half"

Tim-"YA AND IT HURTS LIKE A BITCH!!!!!, AHHH!"

Bridget- " Hey there's good news, it looks like London Bridge Is Falling Down"
by GiggleGoat January 27, 2010
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