A policeman, especially one tasked with harrying street prostitutes
Example: "I ain't telling you nothing, mutton shunter. Stop laughing, it's an insult!"
Example: "Oh man, I'm so scared of birds, I can't even go outside if there are too many out there. I guess you could say I'm pigeon-livered. But please don't, I fear pigeons the most."
A general term of abuse; a rogue or an eccentric
Example: "Sheena is a total ratbag. I'm not sure why I don't like her, but she sucks."
Example: "Stop being vazey and call a cab, Brent. You can't drive. You just asked me if Matt Damon was still stuck in space."