The Collaborative International Dictionary of English v.0.48:

Lazzaroni \Laz`za*ro"ni\ (l[a^]z`z[.a]*r[=o]"n[i^]; It.
   l[aum]t`s[.a]*r[=o]"n[-e]), n. pl. [It. lazzarone, pl.
   lazzaroni.]
   The homeless idlers of Naples who live by chance work or
   begging; -- so called from the Hospital of St. Lazarus, which
   serves as their refuge. [Written also, but improperly,
   lazaroni.]
   [1913 Webster]