American idiom for ' talking very far away from the topic'

[Rossana]

Hi everyone!

Do anyone of you know the Idiom or idioms
for someone who is 'talking very far away from the topic'?

How do you call that act? What's the idiom or american slang for that?

Thanks

[hermit]

"Avoiding the subject"

"Beating around the bush"

Hermit

[ETutor]

Here are some other ways to say it:

A true idiom: “Now this conversation has gone off on a tangent.”
You could also say “I digress.” or “Now we are off topic.”
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