The Collaborative International Dictionary of English v.0.48:

Scribble \Scrib"ble\, v. t. [imp. & p. p. Scribbled (-b'ld);
   p. pr. & vb. n. Scribbling (-bl[i^]ng).] [From Scribe.]
   1. To write hastily or carelessly, without regard to
      correctness or elegance; as, to scribble a letter.
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   2. To fill or cover with careless or worthless writing.
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The Collaborative International Dictionary of English v.0.48:

Scribbling \Scrib"bling\, n. [See 1st Scribble.]
   The act or process of carding coarsely.
   [1913 Webster]

   Scribbling machine, the machine used for the first carding
      of wool or other fiber; -- called also scribbler.
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The Collaborative International Dictionary of English v.0.48:

Scribbling \Scrib"bling\, a.
   Writing hastily or poorly.
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         Ye newspaper witlings! ye pert scribbling folks!
                                                  --Goldsmith.
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The Collaborative International Dictionary of English v.0.48:

Scribbling \Scrib"bling\, n.
   The act of writing hastily or idly.
   [1913 Webster]