Source : Webster's Revised Unabridged Dictionary (1913)

Jiggle \Jig"gle\, v. i. [Freq. of jig.]
   To wriggle or frisk about; to move awkwardly; to shake up and
   down.

Source : WordNet®

jiggle
     n : a slight irregular shaking motion [syn: {joggle}]
     v : move to and fro; "Don't jiggle your finger while the nurse
         is putting on the bandage!" [syn: {joggle}, {wiggle}]