behaving as if you are very important in your job or position, especially because you used to be in

中文解释

（尤指因地位显着提高后）自命不凡的，妄自尊大的 He\'s just a jumped-up office boy (= he was once only an office boy) . 他不过是从办公室勤杂员的位子上升上来的妄自尊大的家伙。