The Collaborative International Dictionary of English v.0.48:

Scribbler \Scrib"bler\, n.
   One who scribbles; a petty author; a writer of no reputation;
   a literary hack.
   [1913 Webster]

         The scribbler, pinched with hunger, writes to dine.
                                                  --Granville.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scribbler \Scrib"bler\, n.
   A scribbling machine.
   [1913 Webster]

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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

scribbler
    n 1: informal terms for journalists [syn: scribe, scribbler,
         penman]
    2: a writer whose handwriting is careless and hard to read [syn:
       scrawler, scribbler]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "scribbler":
   amanuensis, calligrapher, chirographer, clerk, copier, copyist,
   hack, ink spiller, inkslinger, letterer, literary hack, pen,
   pencil driver, penman, penner, penny-a-liner, potboiler,
   recording secretary, scribe, scrivener, secretary, transcriber,
   word-slinger, writer



The Devil's Dictionary (1881-1906):

SCRIBBLER, n.  A professional writer whose views are antagonistic to
one's own.