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Invented by a group of South Florida teenagers on a summer afternoon. Rump jumping is to get completely naked and jump from a structure such as a bridge into a body of water. The higher the jump or the busier the bridge, the better. Often done in the pursuit of Instagram likes or simply a good time with friends.
Sarah: "Theres no way you'd rump-jump off 17th street Causeway into the canal..."
Matt: "Anything for a good laugh and some Instagram likes, grab the camera and lets go"
by killemandgrillem69 November 14, 2013
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