There's a very useful word used by a lot of Indigenous Australians.. "unna"

Depending on how you say it, it can mean..
"is that true"
"no, that can't be right"
"yes, I agree with you"
"do you agree with me"
"are you sure"

and various other phrases.

My mother always describes something that’s comfortable as “the cat’s pajamas.” She’s the only one I know who says it (then again, I probably don’t get out as much as I should).

I'd rather have some cat's pajama's than have a monkey's uncle.

How about "Crimeny!" as a substitiute for all those overused profanities?

The Mental Floss website recently offered "off the cob" as a sub for "corny".

And I'm reminded of two expressions my parents used. My still-living mother still uses "As many (whatever) as Carter has Little Liver Pills" (referrring to the old-time remedy; I think it might still be on the market) and my late father used "Let's Went!", Pancho's catchphrase from the "Cisco Kid" TV show from the 50s.

tjoeb};>

My mother-in-law used to say botheration, or more likely oh dash it.