behind someone's back

Definitions

1. 1

   Without somebody's knowledge

   Without somebody's knowledge; secretly.

   • The employees talked about their boss behind his back.
   • You will lose good karma if you say bad things behind people's backs.
   • I had never defrauded a man of a farthing, nor called him knave behind his back. But now the last rag that covered my nakedness had been torn from me. I was branded a blackleg, card-sharper, and murderer.

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