n.装模做样；矫矜；自鸣得意，沾沾自喜

The Chinese tend to be smug about old age. 中国人向来以高龄为荣。

Why didn't they go away? Smug ones. 他们为什么不走开?自命不凡的家伙们。

There is no smug pullman attached to the train. 这列客车上没有挂上豪华的高级卧铺车厢。

Her smugness irritated me no end. 她的自命不凡简直让我无法忍受。

You have got nothing to be smug about. 你有什么值得自鸣得意的。