请问习语ACT YOUR AGE 什么意思

Act your age. *一般用在父母等上年纪的人教育年轻人时。“做和自己年龄相符的举止、行为”。 How do you like my new red skirt? (你觉得我这条新的红裙子怎么样?) Act your age. (你也不看看你多大了。) You should act your age. *比较温和的说法。

Act your age. 别孩子气；稳重点。

当对方的举止行为不稳重、孩子气时，以此提出批评，希望对方注意自己的举止。

例如：
A: Tell me a story, will you?
B: Be quiet and act your age. Don't be such a baby.
A:给我讲个故事好吗？
B：安静，别孩子气了。

Act your age!
something that you say to someone who is being silly to tell them to behave in a more serious way.
以后查习语可以去这个网站，这类问题都是可以自己解决的。
http://idioms.thefreedictionary.com/act

act one's age 举止与年龄相称