Source : Webster's Revised Unabridged Dictionary (1913)

Scud \Scud\, v. i. [imp. & p. p. {Scudded}; p. pr. & vb. n.
   {Scudding}.] [Dan. skyde to shoot, shove, push, akin to skud
   shot, gunshot, a shoot, young bough, and to E. shoot.
   [root]159. See {Shoot}.]
   1. To move swiftly; especially, to move as if driven forward
      by something.

            The first nautilus that scudded upon the glassy
            surface of warm primeval oceans.      --I. Taylor.

            The wind was high; the vast white clouds scudded
            over the blue heaven.                 --Beaconsfield.

   2. (Naut.) To be driven swiftly, or to run, before a gale,
      with little or no sail spread.

Scud \Scud\, v. t.
   To pass over quickly. [R.] --Shenstone.

Scud \Scud\, n.
   1. The act of scudding; a driving along; a rushing with
      precipitation.

   2. Loose, vapory clouds driven swiftly by the wind.

            Borne on the scud of the sea.         --Longfellow.

            The scud was flying fast above us, throwing a veil
            over the moon.                        --Sir S.
                                                  Baker.

   3. A slight, sudden shower. [Prov. Eng.] --Wright.

   4. (Zo["o]l.) A small flight of larks, or other birds, less
      than a flock. [Prov. Eng.]

   5. (Zo["o]l.) Any swimming amphipod crustacean.

   {Storm scud}. See the Note under {Cloud}.

Source : WordNet®

scud
     n : the act of moving along swiftly (as before a gale) [syn: {scudding}]
     v 1: run or move very quickly or hastily; "She dashed into the
          yard" [syn: {dart}, {dash}, {scoot}, {flash}, {shoot}]
     2: run before a gale [syn: {rack}]
     [also: {scudding}, {scudded}]