For the edification of His Excellency (self proclaimed) and anyone who may be interested.
Spatula City and someone else who I can't quite find the post at the moment, have both mentioned the movie that this expression came from recently, that is 'And don't call me Shirley'. I suppose it is a coincidence. Afer my initial use of the expression, I thought I ought to find out where my memory had extracted such a useless piece of information. That very large search engine immediately gave me the answer. For some reason I had connected it with older times, John Wayne that is. I do know his real name was Sue. Or was it? But it wasn't Shirley, or was it?
The movie was called Flying High, although in the US, it seems it was Airplane! I think I saw it, and it was an ok movie.
And please don't call me Shirley or Andy.