When you use your hips to swing your penis in a circular motion like the blades on a windmill.
Right before I came, I pulled out and did the windmill so it went everywhere.
by Joe Rogue November 16, 2007
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To swing your penis around in a circular motion to appease the ladies.
by Josh Sandlin January 2, 2005
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a formidable fighting tactic in which the aggressor swings their arms in circles on either side of their body while rushing the opponent. Because of it's unorthodox appearance, most people don't take it seriously, however many brave men have fallen to the power of the windmill.
-I wanna see some windmilling in, and if you've got a set of keys on you, stick them in your hand and make them count!
by Hulk Hogan March 20, 2005
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To throw huge wild punches on some prick.
- Yo, if that nob doesn't stop giving me dirties I'm gonna go over throwing a few windmills
by yepsen tsoane March 31, 2006
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Breakdance move which is technically a continuous assisted backspin achieved by rolling high across the shoulders and upper back onto your front and onto your back once again. legs are kept as far apart as possible at all times.

There are many different types of windmill, including super-windmills, no-handed windmills and baby windmills (considarbly harder and achieved by tucking your legs close to your body. the dancer resembles a frictionless ball rotating seemingly endlessly on the ground)
"That guy has incredible windmills!"

"He went straight from a windmill the a headspin"
by breakz April 27, 2004
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while playing guitar or other stringed instrument, throwing your arm up in a counterclockwise motion, over your head and back down again (making an invisible circle with your hand), striking the strings on the upstroke

invented and perfected by Pete Townshend of the who
by mike November 5, 2004
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where you grab the bottom of your cock and start spinning it in the motion of a windmill
I Stood at my bedroom window busting out windmils to all the old people walking past ;)
by J.holmes February 5, 2009
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