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If you have heard American English, you have probably heard this: It's a dime a dozen. What does this phrase mean? Let's find out.
Dime a Dozen 多的是，随处可见，到处都有；价值低
A: There's no need for you to pay $20 for that hair brush, it's too expensive.
B: Why not? I really need it.
A: The store down the street has them at a dime a dozen! Come on, I'll show you.
When you say something is "a dime a dozen," it means that there's a lot of it, it doesn't cost much, or that it isn't special. It's a dime a dozen. This is a common way of saying that something is so easy to get that it doesn't have much value.
And that’s English in a Minute.
