IdiomDaily LifeEnglish

not worth a dime

Meaning: Worthless.

Example: “That so-called antique vase isn't worth a dime.”

Origin: The dime is one of the original denominations of United States currency, authorized by the Coinage Act of 1792, and its name descends through French disme from Latin decima, a tenth — the coin is literally the tenth part of a dollar. It is also the physically smallest coin in ordinary American circulation, smaller than the cent and the nickel despite being worth more than either, which gives the phrase a second layer of dismissiveness beyond the arithmetic. American English has assembled a whole set of these negations around its small change, and the effect in each case is the same: rather than saying a thing has no value, the speaker names the smallest real unit available and denies the thing even that.

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