The Collaborative International Dictionary of English v.0.48:

Camorra \Ca*mor"ra\, n. [It.]
   A secret organization formed at Naples, Italy, early in the
   19th century, and used partly for political ends and partly
   for practicing extortion, violence, etc. -- Ca*mor"rist, n.
   [Webster 1913 Suppl.] Camous

WordNet (r) 3.0 (2006):

Camorra
    n 1: a secret society in Naples notorious for violence and
         blackmail