The Collaborative International Dictionary of English v.0.48:

Waggle \Wag"gle\, v. t. [imp. & p. p. Waggled; p. pr. & vb. n.
   Waggling.]
   To move frequently one way and the other; to wag; as, a bird
   waggles his tail.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Waggle \Wag"gle\, n.
   A waggling or wagging; specif. (Golf), the preliminary
   swinging of the club head back and forth over the ball in the
   line of the proposed stroke.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Waggle \Wag"gle\, v. i. [Freq. of wag; cf. D. waggelen, G.
   wackeln.]
   To reel, sway, or move from side to side; to move with a
   wagging motion; to waddle.
   [1913 Webster]

         Why do you go nodding and waggling so?   --L'Estrange.
   [1913 Webster]

WordNet (r) 3.0 (2006):

waggle
    n 1: causing to move repeatedly from side to side [syn: wag,
         waggle, shake]
    v 1: move from side to side; "The happy dog wagged his tail"
         [syn: wag, waggle]
    2: move unsteadily or with a weaving or rolling motion [syn:
       wamble, waggle]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "waggle":
   beat, bob, bobble, careen, coggle, dangle, fluctuate, flutter,
   lash, librate, lurch, nutate, oscillate, pendulate, pitch, reel,
   resonate, rock, roll, shake, squirm, swag, sway, swing, swinging,
   switch, toss, twist and turn, vacillate, vibrate, waddle, wag,
   wave, waver, wiggle, wobble, wriggle, writhe