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Reverse Swedish Helicopter 

A legendary and extremely difficult sexual act. It is when a female balances on her shoulder blades propped straight up with her genitals perpendicular with the floor, and she supports the male with her feet. He is parallel with the ground but suspended in air by the female. The female will then proceed to spin the male (while inserted inside her) with her feet, constituting a Reverse Swedish Helicopter.

This works best with a strong female and a weak male.
"What is a reverse swedish helicopter?"

"Dude, its like a swedish helicopter, but reverse."

"That's like impossible."

"Naw I've seen it once. It was pretty epic."
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