Put one's foot in one's mouth说错话
　　He put his foot in it（ in his mouth） when he declared that the proposal was ridiculous. The proposal was made by the boss himself.
　　（他不该那样明明白白说这个建议荒唐的。这建议是老板提出的啊。）
　　十八世纪爱尔兰政客博伊尔．罗奇爵士(Sir Boyle Roche)常常发表惊人言论，例如：Half the lies our opponents tell about me are not true！（那些攻击我的谎话，十有四五都是无中生有的！）当时人们笑他失言，就说：He has put his foot in his mouth again。Put one's foot in one's mouth直译是“把自己的脚放进自己的嘴里”，为甚么却解作“说错话”呢？原来这成语是另一个成语put one's foot in it衍生的。Put one's foot in it本来是指一不小心一脚踩在污水或者比污水更加厉害的东西上面；后来，一不小心做了些不该做的事、说了些不该说的话，也叫做put one's foot in it了。
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