The Collaborative International Dictionary of English v.0.48:

Jiggle \Jig"gle\, v. i. [Freq. of jig.]
   To wriggle or frisk about; to move awkwardly; to shake up and
   down.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jiggle
    n 1: a slight irregular shaking motion [syn: joggle, jiggle]
    v 1: move to and fro; "Don't jiggle your finger while the nurse
         is putting on the bandage!" [syn: jiggle, joggle,
         wiggle]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "jiggle":
   agitate, bob, bobble, bounce, bump, didder, dither, falter, fidget,
   flick, flip, flirt, flounce, grimace, have the fidgets, hitch,
   itch, jar, jerk, jig, jigger, jigget, jog, joggle, jolt, jostle,
   pluck, quake, quaver, quiver, rictus, shake, shiver, shock,
   shudder, snake, snatch, start, sudden pull, tic, tremble, tremor,
   tweak, twitch, twitter, vellicate, wiggle, wobble, wrench, wriggle,
   yank, yerk