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An undulation of one's own body, particularly in the hips. This is carried out by Germans and fans of Germans in order to express the incredible contribution that German Pornography has had on the world.

It is also used to celebrate a good day in the stock market by vibrant German lovemakers.
Stewart, a quiet man, turned off his laptop and performed the Frankfurt Shuffle as he and his girlfriend used German 1980's pornography to stimulate their bedroom jollies.
by Dr. Patrinicles Lowenboxen October 10, 2010