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

1.
搞错, 误解
to misunderstand someone or something, especially in communication
:
•
I think we got our wires crossed because I thought you were coming tomorrow, not today.
我想我们搞错了,因为我以为你明天来,不是今天。
•
It seems like we've got our wires crossed about the meeting time.
看来我们搞错了会议时间。