get your lines/wires crossed

get your wires crossed

BRITISH, AMERICAN or

get your lines crossed

BRITISH
If you get your wires crossed or get your lines crossed, you are mistaken about what someone else means. She looked confused at what he said and he began to wonder if he'd gotten his wires crossed. He appeared to get his lines crossed. `What part of America are you from?' he asked. `Sweden,' came the reply. Note: You can also use the noun crossed wires to refer to an occasion when there is confusion about what someone means. After a few minutes of crossed wires and confusion, it transpires Cerys has mistaken me for someone she knows. Note: People used to say they had a crossed line when their phone call was connected wrongly and they could hear someone else's conversation.
See also: crosse, get, wire

get your wires (or lines) crossed

have a misunderstanding.
Wires being crossed originally referred to a faulty telephone connection (‘a crossed line’), which resulted in another call or calls being heard.
See also: crosse, get, wire

get your ˈlines/ˈwires crossed

,

have crossed ˈlines/ˈwires

(informal) misunderstand each other: I think we’ve got our lines crossed somewhere. I said Venice, not Vienna.We must have got crossed wires. I thought you were going to drive, not me.
This refers to telephone wires/lines that are not connected properly.
See also: crosse, get, line, wire