nobody's fool

(set phrase) A person who is not easily deceived or victimized; one who is perceptive, clever, or thoroughly common-sensical.

Japanese Meaning

騙されにくい人 / 抜け目のない人 / 機知に富んだ人 / 被害に遭いにくい人

Don't try to con her; she's nobody's fool.

彼女をだまそうとしないで。彼女は簡単にはだまされない人だ。

Sense（1）

(set phrase) A person who is not easily deceived or victimized; one who is perceptive, clever, or thoroughly common-sensical.

Also, he is nobody's fool. He possesses the brain and strength of character to play his part.

nobody's fools

（ plural ）