That's all well and good but there is no "elite group" here simply backing each other up. If we've never heard it, we've never heard it! There's nothing you or we can do about that. I have read every Stephen King book ever written including "It". If that phrase appears, I am sure I probably worked out what it meant from the context and then never thought about it again. I wouldn't have noted it down in a little book of "idioms used in other countries". Perhaps if I'd gone on to stumble upon it another ten times, it might have sunk in.
No-one is disputing what it means or doesn't mean or how often it appears in Google or anywhere else. All we're saying is that none of us are familiar with it or use it.