A sexual act, where a man places his testicles on his (kneeling) partner's forehead and twirls his penis in a windmill motion.

When you propel your man meat in a circular motion mimicking that of a helicopter or a windmill. When inertia has reached its apex one may exert their cosmic dong clock onto un-expecting objects and/or bystanders. Perfected by Willy Nelson in the late 1980's, this of course inspiring his hit single "whip that sausage right round."

A legendary boxing set up for the big KO,

When three chicks take turns on your knob, one after the other; while one is working on the penis, the other two are performing analingus and/or sucking on your testicles.

interchangeable term with the dutch rudder

A phrase with the same meaning as the "shit hits the fan" but from more original origins. A midden was a pile of general rubbish, generally containing excreations. A windmill is self-explanatory and so when the midden hits the windmill you are all going to get showered in shit.

The verbal threat to cause bodily harm, a severe beating, to kick the crap out of someone.