To cause to move to and fro with short, jerky movements
You can attach the other end of the ribbon to a pole or just hold it and jiggle it for your cat.
Active, high-impact sports make breasts bounce and jiggle.
jiggle the finger against the edge of the guide to see if it is loose.
jiggle keys or a lead.
When the toilet runs, I can do something more than just jiggle the knob.