いないところで

in someone's absence

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phrase Rare #21,045
in someone's absence Often used when talking about doing or saying something while a person is not present; the person is usually clear from context.
JA: 彼のいないところでその話をしないで。
EN: Don't talk about that when he's not around.

彼女のいないところで、そんなことを言うな。

Don't say things like that when she's not around.

私のことを何というにせよ、私のいないところでなく、私の目の前で言って下さい。

Whatever you call me, please say it to my face, not behind my back.

彼女のいないところで、そんなことを言うのはやめなさい。

Stop saying things like that behind her back.

いないところで人の悪口を絶対に言ってはいけない。

You should never speak ill of someone behind their back.