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."
Slappee: Why does
my head hurt?
Slapper: Well my good sir, due to the omega Windmill Dick Slap I had bestowed onto
your forehead, you had slipped into a coma for 27 years 36 days only to be
awoken by yet another Windmill Dick Slap to your forehead. And that my friend is why your head hurts.
