wabble

v. i.

  1. To move staggeringly or unsteadily from one side to the other; to vacillate; to move the manner of a rotating disk when the axis of rotation is inclined to that of the disk; -- said of a turning or whirling body; as, a top wabbles; a buzz saw wabbles.

n.

  1. A hobbling, unequal motion, as of a wheel unevenly hung; a staggering to and fro.