Originating from old England times when people thought that witches existed. People thought that salt would make a witch weak, so the pinch part is pinching of the salt, and the punch part was to banish the witch. The witch would be weak from the salt so the punch was to banish
The saying “Pinch punch first of the month” is something I’ve said since learning the phrase as a little boy, but never really knew why it was said.
So, there we have it. From old England times to banish the witches. Best go get some salt and weaken the witches!