瓦釜雷鸣wa fu lei ming
earthen pot making a lot of noise—man without virture or talent usurping a high position and lording it over others
瓦釜雷鸣wǎ fǔ léi mínɡ
瓦釜:陶制的炊具。沙锅发出雷鸣般的响声。比喻庸人身居高位。an unworthy person making a sensation and enjoying popularity, mediocre persons hold high posts