居ㄐㄩ功ㄍㄨㄥ自ㄗˋ傲ㄠˋjūgōng‑zì’ào

  1. 自以為有功勞而驕傲自滿。例 「他不知謙遜自省，反而居功自傲，令人生厭」。

英satisfied with one's accomplishment and arrogant as a result (idiom)​; resting on one's laurels and despising others