English > ESL Idioms Index

Online ESL Idioms
An online collection of common English idioms.


GO BEHIND SOMEONE'S BACK means to interfere in people's affairs without permission, usually in a dishonest or selfish way. For example:

I thought I trusted him, but I found out yesterday he went behind my back and told everyone about it.

No doubt he was only checking, but she somehow still felt upset that he thought she might go behind his back.

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