01 put on airs
装腔作势，故意摆架子
例：
I find I can't stand for those who put on airs.
我觉得我不能忍受那些摆架子的人。
02 play dumb
装糊涂
例：
Don't play dumb, I know you ate the last piece of cake.
别装傻了，我知道是你吃了最后一块蛋糕。
《纸牌屋》里有句话：Don't play dumb with me. 别跟我装傻。
03 mutton dressed as lamb
装嫩
直译的话，是：老羊装扮成小羊。就是“装嫩”的意思。
例：
He always said he would make a fortune in the west but he's all bark and no bite.
他过去总是说能在西部赚大钱但是他只是只说不做而已。
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