From my old Daddys world:
Horsefeathers! (Disbelief)
Hub deep to a ferris wheel. (Flooded creek)
He's full of (excrement) as a Christmas goose. (Designating a liar)
Squarejohn (neither crook nor cop, just a, well, square john)
Flattie (sucker in a carnival, that is, not a carny)
Tush hog (a tough character)
Tough as a woodhaulers azz
Cutting up old jackpots (reminising with other old outlaws)
Cold as a foot up an eskimos igloo (winter weather report)