smart cookie

(noun) a smart person

Example Sentences:

A: How is your son doing in school?
B: Great! He is getting great marks! He is a smart cookie! How is your son?
A: Terrible! I am jealous!

My new dog is a real smart cookie. She knows how to sit, stay, beg and bark all night.

Note:

smart cookie is often used in an affectionate way

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What Makes a Smart Cookie?

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