Noun

1. An abnormal vibration, especially in the wheels of a vehicle.
2. A dance that was popular in the 1920s.
3. A sleeveless chemise.

Verb

1. To climb something (e.g. a pole) gradually (e.g. using alternately one's arms then one's legs.)

   He shimmied up the flagpole.

   The static made her dress shimmy up her leg.

2. To vibrate abnormally, as a broken wheel.
3. To shake the body as if dancing the shimmy.