The Collaborative International Dictionary of English v.0.48:

Fling \Fling\ (fl[i^]ng), v. t. [imp. & p. p. Flung
   (fl[u^]ng); p. pr. & vb. n. Flinging.] [OE. flingen,
   flengen, to rush, hurl; cf. Icel. flengia to whip, ride
   furiously, OSw. flenga to strike, Sw. fl[aum]nga to romp,
   Dan. flenge to slash.]
   1. To cast, send, to throw from the hand; to hurl; to dart;
      to emit with violence as if thrown from the hand; as, to
      fing a stone into the pond.
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            'T is Fate that flings the dice: and, as she flings,
            Of kings makes peasants, and of peasants kings.
                                                  --Dryden.
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            He . . . like Jove, his lighting flung. --Dryden.
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            I know thy generous temper well.
            Fling but the appearance of dishonor on it,
            It straight takes fire.               --Addison.
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   2. To shed forth; to emit; to scatter.
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            The sun begins to fling
            His flaring beams.                    --Milton.
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            Every beam new transient colors flings. --Pope.
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   3. To throw; to hurl; to throw off or down; to prostrate;
      hence, to baffle; to defeat; as, to fling a party in
      litigation.
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            His horse started, flung him, and fell upon him.
                                                  --Walpole.
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   To fling about, to throw on all sides; to scatter.

   To fling away, to reject; to discard.
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            Cromwell, I charge thee, fling away ambition.
                                                  --Shak.


   To fling down.
      (a) To throw to the ground; esp., to throw in defiance, as
          formerly knights cast a glove into the arena as a
          challenge.
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                This question so flung down before the guests, .
                . .
                Was handed over by consent of all
                To me who had not spoken.         --Tennyson.
      (b) To overturn; to demolish; to ruin.

   To fling in, to throw in; not to charge in an account; as,
      in settling accounts, one party flings in a small sum, or
      a few days' work.

   To fling off, to baffle in the chase; to defeat of prey;
      also, to get rid of. --Addison.

   To fling open, to throw open; to open suddenly or with
      violence; as, to fling open a door.

   To fling out, to utter; to speak in an abrupt or harsh
      manner; as, to fling out hard words against another.

   To fling up, to relinquish; to abandon; as, to fling up a
      design.
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The Collaborative International Dictionary of English v.0.48:

Fling \Fling\, v. i.
   1. To throw; to wince; to flounce; as, the horse began to
      kick and fling.
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   2. To cast in the teeth; to utter abusive language; to sneer;
      as, the scold began to flout and fling.
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   3. To throw one's self in a violent or hasty manner; to rush
      or spring with violence or haste.
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            And crop-full, out of doors he flings. --Milton.
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            I flung closer to his breast,
            As sword that, after battle, flings to sheath.
                                                  --Mrs.
                                                  Browning.
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   To fling out, to become ugly and intractable; to utter
      sneers and insinuations.
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The Collaborative International Dictionary of English v.0.48:

Fling \Fling\, n.
   1. A cast from the hand; a throw; also, a flounce; a kick;
      as, the fling of a horse.
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   2. A severe or contemptuous remark; an expression of
      sarcastic scorn; a gibe; a sarcasm.
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            I, who love to have a fling,
            Both at senate house and king.        --Swift.
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   3. A kind of dance; as, the Highland fling.
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   4. A trifing matter; an object of contempt. [Obs.]
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            England were but a fling
            Save for the crooked stick and the gray goose wing.
                                                  --Old Proverb.
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   5. a short period during which one indulges one's wishes,
      whims, or desires in an unrestrained manner.
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   6. a love affair.
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   7. a casual or brief attempt to accomplish something.
      [informal]

   Syn: shot.
        [PJC]

   8. a period during which one tries a new activity; as, he
      took a fling at playing tennis.
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   To have one's fling, to enjoy one's self to the full; to
      have a season of dissipation. --J. H. Newman. "When I was
      as young as you, I had my fling. I led a life of
      pleasure." --D. Jerrold.
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WordNet (r) 3.0 (2006):

fling
    n 1: a usually brief attempt; "he took a crack at it"; "I gave
         it a whirl" [syn: crack, fling, go, pass, whirl,
         offer]
    2: a brief indulgence of your impulses [syn: spree, fling]
    3: the act of flinging
    v 1: throw with force or recklessness; "fling the frisbee"
    2: move in an abrupt or headlong manner; "He flung himself onto
       the sofa"
    3: indulge oneself; "I splurged on a new TV" [syn: splurge,
       fling]
    4: throw or cast away; "Put away your worries" [syn: discard,
       fling, toss, toss out, toss away, chuck out, cast
       aside, dispose, throw out, cast out, throw away,
       cast away, put away]