be no fool

To be worldly and difficult to trick or deceive. Your teacher is no fool—she'll never believe that your homework blew away on your walk home from school.

be no/nobody's fool

to be intelligent John's no fool. He's never going to believe that excuse.

Common Names:

Name	Pronounced	Usage
Jordana	hor-DAH-nah (Spanish), jawr-DAN-ə (English)	Spanish, Portuguese, Macedonian, English (Rare)
Brynmor	-	Welsh
Nadeem	-	Arabic, Urdu
Grigorii	-	Medieval Slavic
Shanon	SHAN-ən	English
Donald	['dɔnəld]