guttersnipe

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A street urchin.
• noun A person of the lowest class.

from The Century Dictionary.

• noun The common American or Wilson's snipe, Gallinago wilsoni or delicata.
• noun A gatherer of rags and waste paper from gutters.
• noun A street child of the lowest class; a street Arab; a gamin.
• noun An oblong form of printed placard made to be posted on the curbstones of gutters.

from the GNU version of the Collaborative International Dictionary of English.

• noun United States, United States A small poster, suitable for a curbstone.
• noun United States A curbstone broker.
• noun same as street Arab.
• noun a person of low moral character.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A person who is from the lowest social or economic class.
• noun A street urchin.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a child who spends most of his time in the streets especially in slum areas