Source : Webster's Revised Unabridged Dictionary (1913)

Waggish \Wag"gish\ (-g[i^]sh), a.
   1. Like a wag; mischievous in sport; roguish in merriment or
      good humor; frolicsome. ``A company of waggish boys.''
      --L'Estrange.

   2. Done, made, or laid in waggery or for sport; sportive;
      humorous; as, a waggish trick. -- {Wag"gish*ly}, adv. --
      {Wag"gish*ness}, n.

Source : WordNet®

waggishness
     n : waggish behavior [syn: {waggery}]