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]