The Collaborative International Dictionary of English v.0.48:

Jaunt \Jaunt\, v. i. [imp. & p. p. Jaunted; p. pr. & vb. n.
   Jaunting.] [Cf. Scot. jaunder to ramble, jaunt to taunt,
   jeer, dial. Sw. ganta to play the buffoon, romp, jest; perh.
   akin to E. jump. Cf. Jaunce.]
   [1913 Webster]
   1. To ramble here and there; to stroll; to make an excursion.
      [1913 Webster]

   2. To ride on a jaunting car.
      [1913 Webster]

   Jaunting car, a kind of low-set open vehicle, used in
      Ireland, in which the passengers ride sidewise, sitting
      back to back. [Written also jaunty car.] --Thackeray.
      [1913 Webster]

WordNet (r) 3.0 (2006):

jaunty car
    n 1: an open two-wheeled one-horse cart formerly widely used in
         Ireland [syn: jaunting car, jaunty car]