语言学家对俚语没有简单明确的定义，但他们一致认为，俚语是一种不断变化的语言现象，存在于世界各地的亚文化中。俚语是一种非正式的词汇(单词、短语和语言用法)，常见于口头交谈，但在正式写作中避免使用。因为俚语并不总是从字面意义上讲得通，所以您需要熟悉每个俚语的意思和用法。英语俚语是日常英语的重要组成部分。
儒琴今日英语俚语 （English Slang of the Day)
cough (sth) up
to produce money or information unwillingly
勉强给予（钱或信息）
Thousands marched in Seattle Saturday to demand President Trump cough up his tax returns.
Boris Johnson last night went to war with the BBC as he demanded it ‘cough up‘ the money to fund free TV license.
snow job
an attempt to persuade someone to do something, or to persuade someone that something is good or true, when it is not; an effort to deceive, overwhelm, or persuade with insincere talk, especially flattery.
花言巧语的劝说，说服，欺骗
The whole thing is just another Trump snow-job. But his voters will buy almost anything as long as a US-NK breach isn’t blatantly obvious. And that’s what Kim wants to prevent in order to help Trump’s re-election.
Jul. 8, 2019 · … political science at Pusan University in South Korea, said that, “This whole meme is just another Trump snow-job of flim- flam.
American member Helen Ingram told the Calgary Herald, “I’m concerned that First Nations may think this is yet another snow job by a bunch of experts who speak a lot of technical speak.
book-smart
adjective
Having knowledge acquired from books or study; scholarly, bookish; frequently implying lack of common sense or worldliness.
会读书，高学历的， 读书聪明
Book-smart people are well-read. They often know the names of great thinkers, scientists and other famous people in history. They have read classical literature. They know facts and information that many other people don’t. Usually people with book-smarts are good at things like trivia games and crossword puzzles.
However, being book-smart is not everything. Sometimes people who are very educated are not so smart when it comes to life skills and people skills.
street-smart
adjective & noun
On the other hand, people who are good at dealing with practical life problems have lots of street-smarts.
也许没有高学历，但会处世，经验丰富
People who have street-smarts may not have read as many books or earned college degrees. But they have something just as valuable – the ability to use their experiences in many different situations. They are very aware of their surroundings.
Okay, so whether you are book-smart, street-smart or both, being smart is a good thing.
