The Collaborative International Dictionary of English v.0.48:

Ragamuffin \Rag`a*muf"fin\ (r[a^]g`[.a]*m[u^]f"f[i^]n), n. [Cf.
   Ragamofin, the name of a demon in some of the old mysteries.]
   1. A paltry or disreputable fellow; a mean wretch. --Dryden.
      [1913 Webster]

   2. A person who wears ragged clothing. [Colloq.]
      [1913 Webster]

   3. (Zool.) The long-tailed titmouse. [Prov. Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

ragamuffin
    n 1: a dirty shabbily clothed urchin [syn: ragamuffin,
         tatterdemalion]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "ragamuffin":
   Arab, beach bum, beachcomber, beggar, bo, bum, bummer, dogie,
   gamin, gamine, guttersnipe, hobo, homeless waif, idler, landloper,
   lazzarone, loafer, losel, mudlark, orphan, piker, ragman,
   ragpicker, rounder, scarecrow, ski bum, stiff, stray, street Arab,
   street urchin, sundowner, surf bum, swagman, swagsman,
   tatterdemalion, tennis bum, tramp, turnpiker, urchin, vag,
   vagabond, vagrant, waif, waifs and strays, wastrel