since God knows when

When we meet him, he's extremely fit — hasn't had a carb since God knows when, poor Toby!

We are extremely close to the most important American election since God knows when, an election whose reverberations are almost impossible to imagine, let alone measure.

“I’m just asking because not too long ago, the pope did away with limbo. So I’m thinking hell can’t be far behind. But then what’s gonna happen to all those evildoers who’ve been down there since God knows when? And that’s a lot of people.”

“And while you’re at it,” I added, “you might as well bury my mother-in-law’s head. It’s been gathering dust down in the basement since God knows when.”

England are overwhelming favourites as they have been every time we have met since God knows when.