"When a pig dies, presumably in a sty outside, the sun dries out its skin. This effect pulls the pig’s lips back to reveal a toothy “grin,” making it look happy even though it’s dead. This phrase describes a person who’s blissfully ignorant of reality."From "13 Southern Sayings That The Rest Of America Won't Understand." Also explained at the link -
- "We're living in high cotton."
- "He could eat corn through a picket fence."
- "You look rode hard and put up wet."
- "That thing is all catawampus."
- "He's got enough money to burn a wet mule."