what do we call young people wanding on the street doing nothing just hagging out?
correction: wandering not wanding...
Is there an slang term for wandering on the street as well

Question

what do we call young people wanding on the street doing nothing just hagging out?
correction: wandering not wanding...
Is there an slang term for wandering on the street as well

Answer

It depends whether they are "nice" young people, behaving in a civilised manner, or "not nice" young people, behaving badly.
I can't think of a word for the "nice" ones.  Except, maybe, "typical teenagers".
But the "not nice" ones are usually referred to as.....louts, layabouts, trouble-waiting-to-happen, little chavs......plus a few more vulgar terms which my wife won't let me write.

Answer

I guess, that is actually "Hanging out". 
It means spending time together with friends for fun or just to kill the time.