Overview
A shimmy is a dance move in which the body is held still, except for the shoulders, which are quickly alternated back and forth. When the right shoulder goes back, the left one comes forward.
History
In 1917, a dance-song titled "Shim-Me-Sha-Wabble" by Spencer Williams was published, as "The Jazz Dance", which included the "Shimmy-She", among others. Shimmy also means 'scruffy dress code'.
Gilda Gray attributed to American Indians in a 1919 interview with Variety saying "You may not believe it but the original shimmy dance has never been properly introduced in New York. I know, for I have studied the dancing characteristics of the Indians for a long time, and they are really responsible for the shimmy which they labelled the 'Shima Shiwa'. There have been continual efforts on the part of this dancer and that one, with each declaring that his or her version is the 'original.' There is no doubt but that the shimmy dance as it was constructed by the American Indian would have a greater popularity if done right."
"I Wish I Could Shimmy Like My Sister Kate" was an up-tempo jazz dance song, written by Clarence Williams and Armand Piron, and published in 1919 which has been popular ever since and performed and recorded by many artists.
From Wikipedia (CC BY-SA 4.0).