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When in doggy style position, twist your wrist inward to the "thumbs down" position. Place your thumb over her bung-hole and move it back and forth in a circular motion, much like the blades of a helicopter.
Girl to guy: "Give me the Thumbcopter!"

Guy to guy: "I Thumbcoptered her last night - dirty girl"
by Humpmap.com July 15, 2006
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Jul 1 Word of the Day
sending two texts in a row without a reply inbetween.
Rachel: whats up?
Tessa: not to much! hbu?
Tessa: dude, i'm so bored.
Rachel: stop double texting me.
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