between you, (and) me, and the bedpost

between you, (and) me, and the bedpost

What is going to be or has been said should not be told to anyone else. This phrase is usually said along with information that needs to be kept secret. I overheard the boss talking to her secretary last night and—just between you, me, and the bedpost—she's giving the promotion to George after all. Between you and me and the bedpost, Stephanie is not as qualified for this job as she claims to be.
See also: and, bedpost, between
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

between you (and) me and the bedpost

 and between you and me and these four walls
Fig. a somewhat affected way of signaling that you are about to tell a secret. Alan: What's wrong with Ellen these days? She seems so touchy. Jane: Between you and me and the bedpost, I've heard that her boyfriend is seeing someone else. Jill: How much did you get for your used car? Jane: Wellbetween you and me and these four walls—five thousand dollars.
See also: and, bedpost, between
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

between you, me and the bedpost

or

between you, me and the gatepost

If you say that something you say is between you, me and the bedpost or between you, me and the gatepost, you mean that the person you are talking to should not tell anyone else what you have said. Between you, me and the bedpost, I'd say he was completely confused. Between you, me and the gatepost, he'd be better off without her. Note: People also sometimes use fencepost instead of bedpost. That's my opinion, between you, me and the fencepost.
See also: and, bedpost, between
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

between you and me and the bedpost (or the gatepost or the wall)

in strict confidence. informal
The bedpost , gatepost , or wall is seen as marking the boundary beyond which the confidence must not go.
See also: and, bedpost, between
Farlex Partner Idioms Dictionary © Farlex 2017

between you, me, and the bedpost

verb
See also: and, bedpost, between
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

between you and me and the bedpost/gatepost/four walls/lamppost

In strictest confidence. This elaboration of just between you and me is often followed by gossip about someone else. The bedpost version dates from the early nineteenth century and was used by Edward Bulwer-Lytton (Eugene Aram, 1832: “Between you and me and the bedpost, young master has quarrelled with old master”), Dickens, and others. The lamppost version may be a little older, but is not much heard anymore.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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