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
Beulah	BYOO-lə (English)	Biblical, Biblical Hebrew, English
Floris	FLO-ris	Dutch
Edgar	ED-gər (English), ed-GAHR (French)	English, French
Aram (1)	-	Kurdish
Kara (2)	-	Turkish
Helfried	HEL-freet	German