Act your age!

Behave more maturely! (A rebuke for someone who is acting childish. Often said to a child who is acting like an even younger child.) Child: Aw, come on! Let me see your book! Mary: Be quiet and act your age. Don't be such a baby!

Common Names:

Name	Pronounced	Usage
Coco	KO-ko	Various
Bisera	-	Bulgarian, Macedonian
MÓZes	-	Hungarian
Desideratus	-	Late Roman
Woodruff	['wudrʌf]
Whitney	['hwitni]