act one's age

Behave more maturely. Although the phrase often is used in asking children to act in a more grown-up fashion ( Only babies suck their thumbs; act your age), it also may refer to an adult who is, sometimes deliberately, acting much younger than might be considered appropriate ( Grandpa, it's time you stopped climbing ladders and acted your age).

Common Names:

Name	Pronounced	Usage
Kali	KAH-lee (Hinduism)	Hinduism, Bengali, Tamil
Devaraj	-	Indian, Kannada
Somsak	-	Thai
Moreen	maw-REEN, MAWR-een	Irish, English
Pip	PIP	English
Viktor	VIK-tawr (German), VEEK-tahr (Russian)	Swedish, Norwegian, Danish, Icelandic, German, Hungarian, Czech, Slovak, Bulgarian, Russian, Ukraini