A group of punk rock kids on the streets and generally homeless. It is a term which is included in the below animal to people reference on the streets.
Bird = dames, broads, or girls (chicks) - also why being called "daffy" is an insult to a guy)
Cat = a guy always preying on birds (hepcat)
Dog = a guy who cats are afraid of. (where my dogs at)
Wolf = a guy a dog is afraid of (generally in packs)
Skunk = a dirty, lewd street punk (generally from CA)
Rat = short for
street rat
You **** with him you **** with a wolf pack.
Rancid Album - And out come the Wolves