get your wires crossed
US /ɡɛt jʊər waɪərz krɔst/
UK /ɡɛt jʊər waɪərz krɔst/

1.
搞錯, 誤解
to misunderstand someone or something, especially in communication
:
•
I think we got our wires crossed because I thought you were coming tomorrow, not today.
我想我們搞錯了,因為我以為你明天來,不是今天。
•
It seems like we've got our wires crossed about the meeting time.
看來我們搞錯了會議時間。