"a nod's as good as a wink to a blind bat" meaning in English

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          "ref": "1969, Monty Python's Flying Circus, \"Nudge Nudge\", a sketch from the third episode of the British comedy series, first broadcast on the BBC on 19th October 1969, featuring Eric Idle and Terry Jones as two strangers in a pub. Conversation",
          "text": "– Idle: Is your wife a… a goer… eh? Know what I mean? Know what I mean? Nudge nudge. Nudge nudge. Know what I mean? Say no more. Know what I mean?\n– Jones: I beg your pardon?\n– Idle: Your wife… does she, er, does she ‘go’… eh? eh? eh? Know what I mean, know what I mean? Nudge nudge. Say no more.\n– Jones: Well, she sometimes ‘goes’, yes.\n– Idle: I bet she does. I bet she does. I bet she does. Know what I mean? Know what I mean? Nudge nudge.\n– Jones: I’m sorry, I don’t quite follow you.\n– Idle: Follow me. Follow me. And I like that. That’s good. A nod’s as good as a wink to a blind bat, eh?"
        },
        {
          "ref": "1983, Raymond Carver, Cathedral (short story where a blind man visits a couple at their home)",
          "text": "I shook my head. He couldn't see that, though. A wink is the same as a nod to a blind man."
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        "The idea/proposed action is inconsequential to the current situation."
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  "word": "a nod's as good as a wink to a blind bat"
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          "ref": "1969, Monty Python's Flying Circus, \"Nudge Nudge\", a sketch from the third episode of the British comedy series, first broadcast on the BBC on 19th October 1969, featuring Eric Idle and Terry Jones as two strangers in a pub. Conversation",
          "text": "– Idle: Is your wife a… a goer… eh? Know what I mean? Know what I mean? Nudge nudge. Nudge nudge. Know what I mean? Say no more. Know what I mean?\n– Jones: I beg your pardon?\n– Idle: Your wife… does she, er, does she ‘go’… eh? eh? eh? Know what I mean, know what I mean? Nudge nudge. Say no more.\n– Jones: Well, she sometimes ‘goes’, yes.\n– Idle: I bet she does. I bet she does. I bet she does. Know what I mean? Know what I mean? Nudge nudge.\n– Jones: I’m sorry, I don’t quite follow you.\n– Idle: Follow me. Follow me. And I like that. That’s good. A nod’s as good as a wink to a blind bat, eh?"
        },
        {
          "ref": "1983, Raymond Carver, Cathedral (short story where a blind man visits a couple at their home)",
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  "word": "a nod's as good as a wink to a blind bat"
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