Answers to “How did you find out?”

Answers to “How did you find out?”
I heard it through the grapevine.
the grapevine =a chain of rumors
I heard it on the grapevine.
A little bird told me. (cliché)
I have my sources.
I got it straight from the horse’s mouth.(idiomatic)
from the horse’s mouth =from the source
It’s common knowledge.
We live in a fishbowl.(informal)
= We are completely on display . ;We are openly visible to everyone.
 Word travels fast. (cliche)
News travels fast. (cliche)
Bad news travels fast. (cliche)
 None of your business. (informal)
Just never (you) mind.
We have our ways (of finding these things out). (jocular)
I plead the fifth. (informal)
I’m taking the fifth.(informal)
the fifth = the Fifth Amendment to the U.S. Constitution , which Protects against self-incrimination
 I’m not one to kiss and tell .(cliché)
to kiss and  tell =to do something secret and tell everyone about it.