1 Do not bad mouth me.
不要说我坏话。 Mouth在这里做动词，表示说某人坏话。比如：I won't bad mouth Jay even if it kills me.打死我也不说杰伊的坏话。
2 I really put my foot in my mouth this time.
Put ones foot in ones mouth这个短语的意思是say something embarrassing1, make a faux-pas（失言，说错话了）。当你说了不该说的话时，忽然发觉你说错话了，就会这么说。比如：I certainly put my foot in my mouth at the party last night when I asked Mister2 Brown to say hello to his wife for me. Somehow Id forgotten that his wife died six months ago.他说：我昨晚在聚会上无意中说错了话。我让布朗先生替我向他的太太问好。不知什么问题，我忘了他太太已经在半年前过世了。
3 down in the mouth
Down in the mouth是口语，意思是沮丧、垂头丧气。 比如：Why do you look so down in the mouth ?（你为何看上去如此消沉?）She gets down in the mouth over the least little thing.（她动不动就情绪低落。）类似的短语还有down in the dumps，也是形容情绪低落。
4 Do not put words in my mouth
这个短语的意思是替某人说出你感觉他该说的话，把话强加于某人。I never mentioned going away for a holiday: don't put words into my mouth.（我从来没提到过去度假：不要把这个话强加于我！）Now you're putting words into my mouth. When did I say anything about moving？
5 word of mouth/by word of mouth
Word of mouth就是大家常说的口碑。By word of mouth是指大家经由一传十，十传百的口传方法得知某件事，也就是藉着口耳相传，大伙告诉大伙的意思。比如：A：This restaurant is so small, but it's always crowded. How did you find out about it?B：I heard by word of mouth that they had great food.（A：这家餐厅非常小，但却一直客满。你是如何了解这家餐厅的？B：我是藉着人家口耳相传，了解他们卖的东西非常不错吃的。）
6 mouthpiece
Mouthpiece原意是指（乐器、烟斗等的）嘴儿，衔在嘴中的部分，接近嘴的部分，引申为喉舌、代言人、机关报。比如：The newspaper is the mouthpiece of the government.（这家报纸是政府的机关报。）
7 You took the words right out of my mouth
Take the words right out of ones mouth意思是说出了某人想说的话，看法不谋而合。比如：A: Did you see that girl in our English class. She is really beautiful. B: You took the words right out of my mouth.（A：你看见英语课上那个女生了吗？她可真漂亮。B：我也正想这么说。）
8 left a bad taste in my mouth
Leave a bad taste in ones mouth这个短语的意思是留下坏印象。比如：Her rudeness to the old man left a bad taste in my mouth.（她对那位老人的暴力态度，给我留下非常坏的印象。）除此之外，leave a nasty3 taste in ones mouth也可以表达同样的意思。
9 I had my heart in my mouth
Have/bring ones heart in ones mouth是指某事使人很害怕，就仿佛心都被提到了嗓子眼。比如：I had my heart in my mouth when the other car ran through the red light and I knew we were about to crash．表达类似意思的t短语还有：make one's heart leap4 out of his mouth，one's heart stood still等。
10 a person, was born with a silver spoon in his mouth.
Born with a silver spoon in his mouth意思是某生活在一个非常富有些家庭，根本就不需要到外面去找工作来谋生。这种说法源自欧洲的富豪以前的一种习惯做法。当父母为一个宝宝起名字的时候，他们要举行一个宗教仪式。在举行仪式的时候，他们给这个孩子一个银子做的勺。比如：I'll tell you the good thing about our boss. He was born with a silver spoon in his mouth and doesn't have to work at all. But he really works5 harder than anybody in the office.（我来对你说大家老板的优点。他出生在一个很有钱的家庭；他根本无需工作。但，他工作很努力，真是比办公室里其他人都愈加努力。）
11live from hand to mouth
这个短语的意思是仅能糊口、糊口度日，也就是大家说的家无隔宿粮，现赚现吃。如：He got very little pay so he lived from hand to mouth.（他因薪水微薄所以仅能糊口。）
12 a mouthy child
一个喜欢多话的孩子儿。Mouthy做形容词意思是someone who talks a lot and says what he thinks even if it is rude用来表示说大话的或者爱说话的，多嘴的。
13 sTOP mouthing off
这个短语的意思是不要再胡说了。比如If you dont sTOP your mouth off, I won't tell you anything in the future.（假如你还不停止胡说八道，将来我什么也不对你说了。）
14 running my mouth
Run ones mouth意思是to talk excessively6 or foolishly（说得太多，大嘴巴）。在这里作者的意思是他这次说得已经够多了。
