1. have a misunderstanding or miscommunication with somebody
we seem to have our wires crossed
This expression takes a term originally used in a literal sense to describe a misplacement of a call at a telephone operator's switchboard and transfers it to a figurative miscommunication between people. It can be used in reference to any form of communication and is often heard in a professional context where a breakdown in communication is more likely to occur and have greater consequences. To 'get your wires crossed' means to experience a miscommunication between two people or groups. Expressions with similar meanings are 'get the wrong end of the stick,' and 'be at cross purposes.'