"The King's Speech" or "Blustering Bertie" ?

The 2010 Oscar winner for best film was "The King's Speech" ..... which shows how George VI overcame his speech impediment. I have not watched the film, so I am not commenting on that.

It was the story in the film that reminded me that my 'Nana' (Grandmother) used to do a stuttering impression when I was a little kid ... it used to make my mother and her sister laugh. When I asked who it was, they said it was the previous monarch, King George VI who they called by a less than flattering nickname.

Now try as I might I can't find it on the Internet ... it was something like "Stuttering Sam" or "Stuttering Bertie", or "Blustering Bertie", but possibly something else. The point was that it wasn't a name that they had made up, but one commonly used by working class people during the Kings lifetime, but which wasn't used in the press. I don't think it was meant particularly unkindly but wasn't especially affectionate either and mocked his impediment .... very un PC ....  :)