I Came Upon a Lighthouse: A Short Memoir Of Life With Ratan Tata

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Gnanakumar Well, I managed to get an answer with different views from several users from this English Q&A community site after posting this same question over th…moreWell, I managed to get an answer with different views from several users from this English Q&A community site after posting this same question over there.

Short answer: It's not an (established) idiomatic phrase, but a metaphorical one. Literally, it refers to two people talking to each other using only two cups and a string.

Read https://english.stackexchange.com/q/5... for more information.(less)

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