Dork walk 

A form of walking characterized by exaggerated stride and arm swing, usually performed by white suburban women wearing headphones and athletic attire.

Since it isn't really strenuous, the dramatic motions and attire lets observers know they are exercising, not just too poor to afford a car.

Check that out that Dork Walker, she must work at the Ministry of Silly Walks.

Dork walk by Silverbullet November 18, 2006