"Well knock me down and steal muh teeth!"

"Well, butter my butt and call me a biscuit."

Threats:

"I'll slap you so hard, your clothes will be outtastyle."

"This'll jar your preserves."

"Don't you be makin' me open a can o' whoop-ass on ya!"

Good Things/Compliments:

"Cute as a sack full of puppies."

"If things get any better, I may have to hire someone to help me enjoy it."

"Gooder than grits."

The Weather:

"It's so dry, the trees are bribing the dogs."

"It's been hotter'n a goat's butt in a pepper patch."

Wintry roads are said to be "slicker than otter snot."

Descriptions:

A bothersome person is "like a booger that you can't thump off."

When something is bad then you say, "that ain't no count."

If something is hard to do, it's "like trying to herd cats."

"He ran like his feet was on fire and his ass was catchin."

A hectic schedule keeps you "Busier than a cat covering crap on a marble floor."