In Reply to: MY OLD DUTCH posted by Keith S. Rawkins on March 04, 2009 at 15:14:
: With regards to your meaning of MY OLD DUTCH, it DOES rhyme and IS cockney rhyming slang as it comes from Duchess of Fife, not just duchess!!!!!!
As so often, capitals and exclamation marks come in and reason flies out. The term 'my old Dutch' was known before there was a title of Duchess of Fife. That seems to hole your assertion below the waterline. See the link below for more details.