“信口雌黄”是指有些人不顾事实地随意批评或者乱说。“信口”二字容易理解,就是随口的意思,那么“雌黄”是什么呢?雌黄是一种橙黄色的矿物,多为细粒状、片状或柱块状,也有为肾状者,多有珍珠光泽,可用作颜料。古时写字用的纸多是用黄檗染成的(据说用黄檗染纸可以防虫蛀),因此古时的纸往往略带黄色,所谓“青灯黄卷,面壁苦读”是也。现代人写错字可以用涂改液修改,与此相似,古人写错字时就用雌黄把写错的字涂掉后再写。宋人所作的《遁斋闲览》记载:“……有误字,以雌黄灭之,为其与纸色相类。” “Letter port yellow ” refers to some people regardless of fact, arbitrary criticism or chaos. “Letter mouth ” The word is easy to understand, is the meaning of casually, then “female yellow” is what? Female yellow is an orange-yellow mineral, mostly granular, flaky or columnar, but also for the kidney Like, many pearl luster, can be used as a pigment. In ancient times, most of the paper used for writing was stained with barberry (it is said that barley paper can be used to prevent moth-eaten), so old-fashioned paper tends to be slightly yellow in color. Modern people can use the correction to modify the typo, similar to this, when the ancients used typos to write the wrong words and then write down the wrong words. Song made by the “escape fasting Leisure” records: “... ... words are wrong, with the female yellow off, as it and paper color similar.”