Wig·wag v. t. & i.  [imp. & p. p. Wigwagged p. pr. & vb. n. Wigwagging ] To move to and fro, to wag.
  wigwag
       v 1: send a signal by waving a flag or a light according to a
            certain code
       2: signal by or as if by a flag or light waved according to a
          code
       [also: wigwagging, wigwagged]