Definitions of shimmy:

• noun:   lively dancing (usually to ragtime music) with much shaking of the shoulders and hips
• noun:   an abnormal wobble in a motor vehicle (especially in the fromt wheels)

  Example: "He could feel the shimmy in the steering wheel"

• noun:   a woman's sleeveless undergarment
• verb:   dance a shimmy
• verb:   tremble or shake