When one grabs onto the females legs (or males) and throws her into a double front flip (or double back flip if you're a risk taker) and simultaneously takes off his clothes and her clothes and then completes a full insta-boner and as she falls to the ground from the flips, she lands on the fully erect penis, as it goes straight inside her auns.

Please note: This is a very risky maneuver, I highly suggest you do not try this! It has never been fully completed before and is illegal in 23 countries.
Jeff gave Troy the greatest Double Buttfuck Back Flip the other night, he had to go to the hospital!
by falloutsux July 26, 2009
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