put on the dog 装腔作势；摆架子；摆阔气

【例句】
My wife always feels like she has to put on the dog whenever my parents come to visit.
我妻子总觉得当我父母来的时候，她必须得装腔作势。

What I like about him was that he never put on the dog to show off his money.
我喜欢他的一点的是他从来不摆阔气来炫耀他的富有。