behind somebody’s back
成語所屬單字back
behind somebody’s back — 慣用語
1. Doing something without someone's knowledge, often in a dishonest way.
1.慣用語
釋義
在背後
Doing something without someone's knowledge, often in a dishonest way.
例句
They made plans behind my back and didn't invite me.
Sara was angry that her friend talked about her behind her back.