I was watching Hugh Grant's About a Boy and I had minor difficulty understanding some of the dialogue used in the movie.
The fine folks of England have, aside from the accent, a slightly different vocabulary than, say, Canadians, Australians and Americans. From what I gathered:
A bloke is an average guy. A slowcoach is equivalent to a slowpoke. A nappy is a diaper. A fag is slang for cigarette.
Does anyone know more?