Urban Dictionary is your friend. The people described by those words tend to be the underprivileged if not also poorly educated people who turn to certain expensive fashion (and sports) brands along with a hard man (or woman) attitude to enhance their apparent status.

Frankly, I’d rather they spend their money and time on that than the other things similar groups also turn to, like drugs or nationalism. (Although in many cases it goes hand-in-hand, unfortunately, which only serves to amplify the hate from the rest of society.)