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
Davida	-	English (Rare)
Emiliana	e-mee-LYAH-nah (Italian, Spanish)	Italian, Spanish, Portuguese
Zachariah	zak-ə-RIE-ə (English)	English, Biblical
LÍA	LEE-a	Galician
Taiki	tah-ee-kee	Japanese
MatjaŽ	-	Slovene