these four walls

these four walls

The room one is currently in. Used when one is telling someone a secret that one doesn't want told to anyone else. Now, this can't leave these four walls, but I Janet told me she's pregnant!
See also: four, these, wall
Farlex Dictionary of Idioms.

these four ˈwalls

used when you are talking about keeping something secret: Don’t let this go further than these four walls (= don’t tell anyone else who is not in the room now).
See also: four, these, wall
Farlex Partner Idioms Dictionary
See also:
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • cooking for one
  • give (one) (one's) head
  • give head
  • give somebody their head
  • give someone their head
  • 1FTR
  • as one door closes, another (one) opens
References in classic literature
I used to think these four walls could stand against anything.
Phillip explained: "The weird thing is, we just did the las thing we're ever going to do in these four walls because they'll never be these four walls because they're pulling it down and rebuilding it.
This is the last thing we'll ever do in these four walls!"
Recorded in New York and Austin, Texas, These Four Walls was produced by Colvin's longtime collaborator John Leventhal.
These Four Walls features several guest artists: Grammy Award winners Patty Griffin and Marc Cohn on Cinnamon Road, English singer/ songwriter Teddy Thompson on Let It Slide, and pedal steel great Greg Leisz on the title track.