It is an expression commonly used ironically to introduce a cliché or a banal sentiment

RE:
Where does the saying "To Coin A Phrase" come from?

To coin a phrase is to make one up.It fills a need in whatever is trying to be said.

The phrase is always about an event that occurs over and over.It is to make a proverb.

Koine Greek was not the correct,bookwormish type.It had slang just like everyday English.

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Very slutty thoughts.