act (one's) age(redirected from Act age)
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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.
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!
See also: act
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).
act your age
If you tell someone to act their age, you are telling them to behave in a way that is suitable for their age, because they are behaving in a childish way. One patient complained that the nurse had told her: `Act your age and pull yourself together.' Note: This expression is used to express disapproval of someone's behaviour.