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drop a dime

  1. Inform on or betray someone, as in No one can cheat in this class—someone's bound to drop a dime and tell the teacher. This expression, alluding to the ten-cent coin long used for making a telephone call, originated as underworld slang for phoning the police to inform on a criminal and occasionally is extended to any kind of betrayal. [1960s]



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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They encouraged anonymous tipsters to drop a dime on gang members or their collaborators.

Read more on Seattle Times

They didn’t break the law to make a billion dollars — at least usually not — so you can’t drop a dime on them.

Read more on New York Times

That means you might have to pay full price to play God of War: Ragnarok when it releases, while Game Pass subscribers won’t have to drop a dime extra to play Starfield.

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And William L. Rukeyser of Davis, Calif., pointed out that we still use the expression “Drop a dime” on someone.

Read more on Washington Post

It just got a lot easier to drop a dime on them.

Read more on Washington Times

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drop a brickdrop a line