1. to betray or harm someone who trusts you, especially by acting against them secretly
Usage: informal

Examples

• I can’t believe she would backstab her best friend like that.
• He felt backstabbed when his colleague took credit for his work.
• Don’t backstab people if you want to maintain good relationships.
• The politician was accused of backstabbing his own party members.
• She backstabbed him by revealing his secrets to their boss.
• It’s wrong to backstab someone who has always been loyal to you.