Cockney is both used as an accent and an area description. A mug is like 'your a mug', like your stupid, foolish.
No, 'proper naughty' isn't an official meaning of mean people in the UK, it's just a phrase a small amount of people use, and normally satirically.
Really I thought average size was 8 1/2 inches? Thought I read something like that before? But Fuck.. this is awesome, before I was happy to just get over average, now I'm laughing . Always wondered why Jenna always compliments me, thought she was just humoring me before .