A while ago I asked about the 'till the cows come home'. And it came clear that it isn't used in formal writing. Today, however, I came across with an idiom 'till/until kingdom come'. Could this, therefore, be used in a formal writing, in essays, for example?
Top answer
I don't think this is much better. com/topic/kingdom-come
— Marius Hancu
I don't think this is much better.
com/topic/kingdom-come
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