*crazy as a betsy bug
and *crazy as a peach-orchard boar; *crazy as a loonRur. acting as if insane. (*Also: as ~.) 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.
Heavens to Betsy!
Inf. My goodness! (A mild oath.) Heavens to Betsy! What was that noise? Heavens to Betsy! It's good to hear your voice!