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
Shannon	['ʃænən]
Aintzane	-	Basque
Stiina	STEE:-nah	Finnish
Sveta	-	Russian
Galahad	GAL-ə-had (English)	Arthurian Romance
Adelheid	AH-del-hiet (German), AH-dəl-hiet (Dutch)	German, Dutch