The Collaborative International Dictionary of English v.0.48:

Haw \Haw\, v. i. [imp. & p. p. Hawed (h[add]d); p. pr. & vb.
   n. Hawing.] [Written also hoi.] [Perhaps connected with
   here, hither; cf., however, F. huhau, hurhau, hue, interj.
   used in turning a horse to the right, G. hott, h["u], interj.
   used in calling to a horse.]
   To turn to the near side, or toward the driver; -- said of
   cattle or a team: a word used by teamsters in guiding their
   teams, and most frequently in the imperative. See Gee.
   [1913 Webster]

   To haw and gee, or To haw and gee about, to go from one
      thing to another without good reason; to have no settled
      purpose; to be irresolute or unstable. [Colloq.]
      [1913 Webster]