Are we talking only serious crimes like murder, drug dealing and the like or any crime or any level?
Apparently it's crimes per head of population, hence london fares relatively well.
Oiks are very lower class scruffy loking people with lots of tatoos, shellsuits and women who smoke while pushing their prams around. Chavs are people who dress in cheap jewellrey, wear burberry caps and say 'innit' alot. Chavs can also be people with a bit of money but bad taste. A person who plays golf in an Arsenal shirt is a Chav.
Twokkers are lowlife scum who steal cars. It's an acronym for Taking Without Owners Consent.