Windmill with fists

Dancing in an erratic fashion. Having spasms of the body that one considers dancing. Other dancers need to stay clear for fear of getting accidentally punched. Also known as the Elaine.

Dude 1: "Hey, check out that chick dancing over there"
Dude 2: "Ha! She looks like a windmill with fists!"
Dude 1: "Yeah. You'd better duck!"