crazy as a peachorchard boar

*crazy as a betsy bug & *crazy as a peachorchard boar & *crazy as a loon

Rur. acting as if insane. (*Also: as \crazy as a peachorchard boar.) •

Tom: Susan says she's really the Queen of England. Bill: She's crazy as a betsy bug.

•

Jill: David's a little eccentric, isn't he? Jane: Crazy as a loon, I'd say.

•

What's wrong with Jim? He's acting as crazy as a peach-orchard boar.