My father used to say, 'RISSOLES!'
No prizes for guessing what that was a substitute for.
He did use swear words as well but could be quite 'poetic' about it. I remember him banging crossly about the house when he couldn't find something - 'Cr*p and corruption! Sh*t and seduction!' etc.
Nothing so inventive in this house!
So Harry and family are coming back!
Reducing contact because my heart just isn't in it.
How to get help putting suitcase on the conveyor belt at airport check-in

I think even shouting Arrrggghhh Sherbert Dibdabs can be swearing if it's used in context!