"Street punks" refers to young individuals, often teenagers or young adults, who engage in rebellious or law-breaking behavior in public spaces, particularly in urban areas. Full definition
Ah, but turn your back on him, try to sneak a pass by him or push him around a little and this fourth - grader turns into a tough street punk. (si.com)
You now had more special moves and ways to take down the waves and waves of street punks you were pitted against and it felt good! (xblafans.com)