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I would like to know if there is an idiom or a proverb in English to denote a situation in which one watches a play or a dramatic performance without knowing its story. It is similar to participating in a discussion and opining in it without having much idea about the incident on which the discussion is in progress.

I would use the expression in a context like: "I don't know really what happened earlier, who said it, to whom and what exactly. So, my interference is (like)......"

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  • Do you mean without knowing what happened earlier – not starting at the beginning? – Weather Vane Jun 22 '19 at 17:37
  • @WeatherVane yes, I don't have the details of the incident, still I opine on it. – mahmud k pukayoor Jun 22 '19 at 17:41
  • I see, in BrE there is a rude expression for that: "talking out of one's arse". – Weather Vane Jun 22 '19 at 17:45
  • In AmE, it is of course “talking out of one’s ass”. – Gort the Robot Jun 22 '19 at 17:50
  • @StevenBurnap Both the idioms (Yours and Weather Vane's) are vulgar slangs as per the dictionary of idioms, and they mean a foolish talk. My idea is that the interference that I mentioned is not necessarily a foolish attempt, but rather irrelevant. – mahmud k pukayoor Jun 22 '19 at 17:55
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to have no idea what one is talking about

Example:

Well, I have no idea what I'm talking about, but I can tell you my opinion about this, for what it's worth. Etc.

Alternative:

Well, this might be completely off base, but my uneducated opinion is etc.

This expression comes from baseball.

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