a dime a dozen

US /ə daɪm ə ˈdʌzən/

UK /ə daɪm ə ˈdʌzən/

1.

very common and of no particular value

:

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Good ideas are a dime a dozen, but execution is key.

•

In this city, coffee shops are a dime a dozen.

:

dime on a dime dozen drop a dime on baker's dozen nineteen to the dozen it's six of one and half a dozen of the other