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"