Wabble
WABBLE, verb intransitive To move from one side to the other; to vacillate; as a turning or whirling body. So it is said a top wabbles, when it is in motion, and deviates from a perpendicular direction; a spindle wabbles, when it moves one way and the other. [This word is applied chiefly to bodies when turning with a circular motion, and its place canot be supplied by any other word in the language. It is neither low nor barbarous.]