The Collaborative International Dictionary of English v.0.48:

Trifling \Tri"fling\, a.
   Being of small value or importance; trivial; paltry; as, a
   trifling debt; a trifling affair. -- Tri"fling*ly, adv. --
   Tri"fling*ness, n.
   [1913 Webster] Trifloral

The Collaborative International Dictionary of English v.0.48:

Trifle \Tri"fle\, v. i. [imp. & p. p. Trifled; p. pr. & vb. n.
   Trifling.] [OE. trifelen, truflen. See Trifle, n.]
   To act or talk without seriousness, gravity, weight, or
   dignity; to act or talk with levity; to indulge in light or
   trivial amusements.
   [1913 Webster]

         They trifle, and they beat the air about nothing which
         toucheth us.                             --Hooker.
   [1913 Webster]

   To trifle with, to play the fool with; to treat without
      respect or seriousness; to mock; as, to trifle with one's
      feelings, or with sacred things.
      [1913 Webster]

WordNet (r) 3.0 (2006):

trifling
    adj 1: not worth considering; "he considered the prize too
           paltry for the lives it must cost"; "piffling efforts";
           "a trifling matter" [syn: negligible, paltry,
           trifling]
    n 1: the deliberate act of delaying and playing instead of
         working [syn: dalliance, dawdling, trifling]