Definitely not a “thing,” and extra definitely not contemporary.

I’ve only ever known one other person to say it, and that was the ex partner my comment above was about! They had a really playful way of speaking, and I realise in retrospect I’ve unconsciously taken on a lot of their little idiosyncrasies.

I had to look it up, but it looks like it’s a reference to this line from High Anxiety with Mel Brooks.