Alistair, we used to use "done a bunk" here to mean "made off with". Heres a wonderful nineteenth century word that means the same thing in reference to money: absquatulate.
Here are some other coloquallisms:
slick as greased owl shit
sweet face -- say whatever the other person wants to hear (as in, 'He's just sweet facing her')
I've heard local builders use 'gnat's ass' and 'c**t hair' to describe taking just a smidge off a plank.

And then there's that list that was circulating a while ago from the computer folks. Had 'idea hampster', 'prairie dogging at the cube farm', (popping up of heads to see where the disturbance is), going 'postal'. buncha others. Anyone?

One of our local farmers tells us to plant when the oak leaves are as big as squirrel's ears.

What did your area call a "Chinese Junk Boat Fire Drill", that teenage car game that involved ejecting and rearranging all the passengers at a redlight, hopefully before it changed?
Blessings,
Barbara