The Collaborative International Dictionary of English v.0.48:

Waspish \Wasp"ish\, a.
   1. Resembling a wasp in form; having a slender waist, like a
      wasp.
      [1913 Webster]

   2. Quick to resent a trifling affront; characterized by
      snappishness; irritable; irascible; petulant; snappish.
      [1913 Webster]

            He was naturally a waspish and hot man. --Bp. Hall.
      [1913 Webster]

            Much do I suffer, much, to keep in peace
            This jealous, waspish, wrong-head, rhyming race.
                                                  --Pope.
      [1913 Webster]

   Syn: Snappish; petulant; irritable; irascible; testy;
        peevish; captious.
        [1913 Webster] -- Wasp"ish*ly, adv. --
        Wasp"ish*ness, n.
        [1913 Webster]