(Neglected) child of the streets

• Bit of riffraff
• Slum child
• Child of the streets
• Person behaving as one brought up in squalor
• Vulgar one
• Threaten to go out and shoot street urchin

Wiktionary Word definitions in Wiktionary
n. 1 (cx derogatory English) A person who is from the lowest social or economic class. 2 (cx derogatory English) A street urchin. 3 (cx dated slang English) A small poster , suitable for a kerbstone. 4 (cx dated slang US English) A kerbstone broker.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
also gutter-snipe , 1857, from gutter (n.) + snipe (n.); originally Wall Street slang for "streetcorner broker," attested later (1869) as "street urchin," also "one who gathers rags and paper from gutters." As a name for the common snipe, it dates from ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Guttersnipe \Gut"ter*snipe"\, n. (Slang) A small poster, suitable for a curbstone. A curbstone broker. [U. S.] same as street Arab . a person of low moral character.