My mum used to say both 'Charlie's dead' and 'I've got a bone in my leg'. Another one was 'This won't do for a parson's daughter' when she needed to get on with something. One of the most bizarre was 'Well what do you expect me to do about it - give birth to a box of kippers?' if we were whinging about something unnecessarily.
I wonder if some of these were maybe regional. My mum grew up in London, but both her parents were from Sheffield, so I guess they could be either cockney or Yorkshire.