Thats a street urchin. Strangely, this blog post was one of the first links that came up. It ponders how the name street urchin came to be.

It says

Looking in the OED, I see two possibly relevant definitions. 1c. A goblin or elf. (From the supposition that they occasionally assumed the form of a hedgehog.)… There is also 4a. A pert, mischievous, or roguish youngster; a brat.

Edit: formatting is crazy