I love old expressions that you hardly ever hear anymore. Don't you? Let's bring some of these back!

Exclamations
What in tarnations?
Dagnammit!
Sweet sassy molassey!
Galloping gargoyles!
By George!
By Jingo!
For Pete's sake!
Leaping lizards!

Descriptive Phrases
from heck to breakfast
knee high to a grasshopper
darn tootin'
fit as a fiddle
fit to be tied
snug as a bug (in a rug)
splash my boots
got a hankering
when the apricots bloom
apple pie order
small potatoes

Expressions
Hey is for horses
Paint the town red
The world is your oyster
greatest thing since sliced bread

And of course, this classic from the lovely Nicolle: "There's more than one way to skin a cat with a bullfrog up its ass!"