Don't bite off more than you can chew. - Don't try to accomplish too much at one time.
Bless your heart. - Means you're an idiot. Sarcastic.
He hasn't got the sense God gave a goose. - He's an idiot.
Don't fly off the handle. - Don't get angry.
Happier than a pig in shit. - Obviously you're very happy, lol.
And more. xD
Yeah, I'm Southern. lol