Comprehensive resource for understanding and mastering English idioms
The idiom "on the line" refers to a person who is directly affected or involved in something, or someone who is immediately available to answer questions or participate in discussions related to a particular topic. It can also mean being committed to a course of action or decision.
The idiom "on the line" has been used since at least the early 20th century in English literature. Its earliest known use was in the poem "Road Not Taken" by Robert Frost, published in 1916. The phrase appears in the second stanza of the poem: "Two roads diverged in a yellow wood, / And sorry I could not travel both / And be one traveler, long I stood / And looked down one as far as I could / To where it bent in the undergrowth." The phrase has since been used in various forms throughout history, including its use as a political slogan during presidential campaigns. For example, during his first campaign in 1968, Senator Richard Nixon famously said, "I am not a panderer who will go on the line to get votes." This statement suggested that he was willing to make difficult decisions and not compromise his principles for popularity.