冒牌

That man is a total phony, he palms himself off as a Ph.d.

那家伙是彻彻底底的冒货,他冒称是。

He succeeded in his profession, but he always secretly considered himself an impostor.

他在专业方面很成功，但他常暗自认为是冒货。

Australia's bunyip aristocracy.

澳大利亚的冒贵族阶层。