idioms

to put in a nutshell

using as few words as possible

to get straight to the point

to be concise and don't ramble

to hear it on the grapevine

to hear news from someone who heard the news from someone else (usually + that) I heard on the grapevine that she was pregnant, but I don't know anything more.

to get the wrong end of the stick

to not understand a situation correctly

to put someone in the picture

to update someone after some break in the topic/conversation

to be on the same wavelength

to have a lot in common in somebody and thus always understand each other

can't make head nor tail of it

to fail to understand anything

to talk at cross-purposes

with different intention / in ways that are opposed to each other

to beat about the bush

to delay talking about something / to avoid talking about a difficult or embarrassing subject because you are worried about upsetting the person you are talking to

to get it straight from the horse's mouth

to get information from the person most directly involved or best informed

to be like talking to a brick wall

try to communicate with unresponsive person

to keep someone in the loop

to include someone in the communication