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Related to lamppost: hesitancy, meddles

between you, me, and the lamppost

In complete confidence between the speaker and the listener, as of a forthcoming secret or rumor. Now, this is between you, me, and the lamppost, but I'm thinking about filing for divorce. Between you, me, and the lamppost, I hear that they're going to lay off half the staff by the end of the week.
See also: and, between, lamppost
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

between you and me

Also, between ourselves; just between you and me and the bedpost or four walls or gatepost or lamppost . In strict confidence. For example, Just between you and me, it was Janet who proposed to Bill rather than vice versa. This phrase, dating from about 1300, is generally followed by some informative statement that the listener is being asked to keep secret. The variant with bedpost, also shortened to post, dates from the early 1800s; four walls, also shortened to the wall, dates from the early 1900s, as does the gatepost.
See also: and, between
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

between you, me, and the lamppost

and between you, me, and the bedpost
phr. just between you and me. Between you, me, and the lamppost, things are going to get worse before they get better. It’s supposed to be a secret, but between you, me, and the bedpost, he quit his job.
See also: and, between, lamppost
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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References in periodicals archive ?
DAY 1 Rest DAY 2 Jog 2 lampposts, walk one lamppost for 15 minutes DAY 3 Rest DAY 4 Jog 10 minutes, walk until you catch your breath, jog for 5 minutes DAY 5 Rest DAY 6 Rest DAY 7 Jog for 20 minutes.
"They must have been travelling at some speed as they took down the lamppost. They took two other cars out before hitting the lamppost.
Another car was also damaged in the incident and firefighters made the damaged lamppost safe.
Pictures show the lamppost almost unearthed from the ground and there are also tyre marks on the road.
Builders at the Persimmon Homes site laid the new 4ftwide Tarmac pavement around the lamppost at their new estate at Hay-on-Wye.
The accident, at the junction with Meadow Brook Road, destroyed the lamppost under a mobile phone mast and the cable box.
Dietz wrote that her son had been parking next to the same lamppost for the last year.
"The next minute he was standing under a lamppost," said Mr Smith senior.
The road was later cleared thanks to a local tree surgeon and Leicestershire Police attended the site and moved the fallen lamppost.
'But you guys have already learnt to become invisible,' I said, 'hiding behind lampposts, behind bushes, trying to become part of the background, and doing a good job of it.'
HyperMedia manages 690 lampposts across the UAE's seven emirates.
Summary: The first-of-its-kind initiative gives the UAE citizens an opportunity to re-rent these lampposts for promotion and advertising purposes and make profit.
THIS was the scene in Walsgrave after a car mounted the kerb and smashed into a lamppost.