act (one's) age

To act in accordance with one's expected level of maturity. Really, John, act your age a little, you're like a child sometimes. I'm glad that Sarah is so committed to her studies, but sometimes I wish she would act her age and go out with friends a bit.

Common Names:

Name	Pronounced	Usage
Ioachim	-	Judeo-Christian Legend
NathÁLia	-	Portuguese (Brazilian)
Sandra	SAHN-drah (Italian, Dutch, Finnish), SAN-drə (English), ZAHN-drah (German)	Italian, English, French, Spanish, Portuguese, German, Dutch, Swedish, Norwegian, Danish, Icelandic,
Annisa	-	Indonesian
Fatemah	-	Persian
Subramaniam	-	Tamil