The Collaborative International Dictionary of English v.0.48:
Guttersnipe \Gut"ter*snipe"\, n. (Slang) 1. (a) A small poster, suitable for a curbstone. (b) A curbstone broker. [U. S.] [Webster 1913 Suppl.] 2. same as street Arab. [PJC] 3. a person of low moral character. [PJC]WordNet (r) 3.0 (2006):
guttersnipe n 1: a child who spends most of his time in the streets especially in slum areas [syn: street urchin, guttersnipe]