瓦釜雷鸣wǎ fǔ léi míng

瓦锅发出很大的声响，比喻庸人煊赫一时(见于《楚辞·卜居》：“黄钟毁弃，瓦釜雷鸣。”)

英mediocre people are in power; can be compared to earthen pots making a lot of noise instead of the classical bells;