Thanks! I hate it when I don’t get those colloquialisms! (Every time I think I’m educated I learn something else. Keeps me pretty busy).
You're quite welcome and I'm delighted to have been of some help. I agree about learning....at the point when I decide that I've learned everything I hope that there are enough caring people around me who will shoot me and put me out of my arrogant misery :-)
Re British slang, there are a number of GREAT specialty dictionaries for that on the internet that may be worth bookmarking. Some of my favorites are:
BBC America - British American Dictionary
Dictionary of English slang and colloquialisms of the UK
Be warned, however, that there will be many bawdy and off-color terms and expressions dealt with on these pages and so they may not be suitable for children and those faint of heart (not meaning to imply that you would fall into such a category, of course)
Slang dictionaries exist for many other variations as well, including but not limited to Australian, Irish, etc.
You can find a boatload of them by searching with such keyword phrases as "Australian slang dictionary", "British slang dictionary" etc.