The Collaborative International Dictionary of English v.0.48:

Gamin \Gam"in\, n. [F.]
   A neglected and untrained city boy; a young street Arab.
   [1913 Webster]

         In Japan, the gamins run after you, and say, 'Look at
         the Chinaman.'                           --L. Oliphant.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gamin
    n 1: (sometimes offensive) a homeless boy who has been abandoned
         and roams the streets [syn: street arab, gamin,
         throwaway]