between you and me (British, American & Australian) also between you, me and the bedpost/gatepost (British & Australian humorous)

between you and me (British, American & Australian) also between you, me and the bedpost/gatepost (British & Australian humorous)
something that you say when you are going to tell someone something you do not want them to tell anyone else Just between you and me, I don't think his work is quite up to standard. Between you, me and the gatepost, I'm thinking of leaving. See between the devil and the deep blue sea, between a rock and a hard place

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