Meaning of “be a dime a dozen” in the English Dictionary

british dictionary

"be a dime a dozen" in British English

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be a dime a dozen

US UK be two/ten a penny

to be common and/or of very little value:

Books like this are a dime a dozen.

(Definition of “be a dime a dozen” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)