【正文】 nal background that make up the decision of the differences between way of thinking and values of the group members, people39。s recognition, will be using the spread. Slang generated and no scientific law. Slang is simple, convenient and lively authentic performance characteristics and its close relationship is irreplaceable, and is the main causes of slang. History In the ?Westward Movement? of 19 century, many Americas moved to the west which caused largescale migration. The American government pays less attention to the ?standard English? and standardizes the English. The history of America is not as long as other countries, so it has not traditional restriction to the people?s language form, which is different from British people who stress on the socalled ?the king?s English?. Therefore, the dialect and the jargon of each level are mixed together, and which spread quickly among the majority. Such dialect and jargon evolved the slang little by little for their wide usage. Culture A variety of Subcultural Groups Exist Peng Yuanfeng and Sun Peijie said: Since there will be a human language with slang, slang of production and social and cultural ties of ethnicity, [1]. 8 Subcultures of American society for the production of slang provide fertile soil. In the past, it was drug addicts, homeless, black, gambling, and prisoners to use the language of the lower, such as the nose candy, horse, grass, weed tea, pot, black stuff, mud, shooting gallery, etc.. in the black munity, it is a large number of manufacturing and usage, such as the dog juice (cheap wine), jazz (jazz), blues (blues), cat2walk (walking dance), rock roll ( rock) and so on. With the development, the source of slang and its meaning has expanded continuously, cowboys, soldiers, policemen, athletes, also joined the team. Subculture positive infiltrate mainstream culture. Later, students, politicians and businessmen also joined in the creation and use of slang in the ranks. Thus, from the President to civilians in the use of slang. such as former . President Ronald Rea gan liked to say a word is: Here we go again. The implied meaning of the speaker on a matter of repetition has been a bit impatient. As long as he was at the press conference intractable problems continue to bother the same time these words from his mouth would blurt out. The Infiltration from Asian Culture to the Dominant Culture The frequent exchanges of subculture between Member States strengthen the groups spread out within a slang trends, led to help in the subculture to be outside the public in widely disseminated (Pengyuan Feng, Sun Peijie, 2020). For example, gamblers with a buck (= dollar) and the big one refers to 100 yuan, respectively, and a thousand dollars bet, because the two words in the subculture within the high frequency of occurrence, to infiltrate groups, the group was outside the people use, so buck on to refer to 100 yuan, big one to refer to 1000 yuan. The Social and Cultural Conditions American Culture and the Diversity of National Character. The United States is a multiethnic, multicultural focus, the historically known as the world39。s stolen goods to the sales site for samples. Some American slangs from the political sphere. A lot of slangs related to politic are fostered by Powerful American political system and a large number of political events. As these slangs with very high concern of usage, and some of them have entered the ranks of the daily standard language. Such as: baby kisses mean that politicians who are good at public speaking to win over the hearts and minds. Some slang from various professions. . military, universities and schools are conducive to a large number of . production areas. For example: flag means give a person F. that some a person whose some a homework is failing. In United States, the colorful culture of social such as ball games and sports, fast food , film and television also contributed to a lot of slangs. Since the invention of television, since the popular TV show is wele, this has generated a lot of this related to the slang. Such as: couch potato are those who sit all day watching TV fans. Language Itself Linguistic Analysis Slang as a language, it only lives in human society during its use. ① It is people need to interact generated. Slang is the jargon of social overlap between popular culture and then overlap (is mon parts, and the mon part is a powerful tool to municate with them). It meets the exchange of different sectors of the needs of people, so its appearance is inevitable. ② language as the development of human society is gradually improving. 7 Social Development is the Motive of the Development of Language. Meyer (A. Meillet) think that the language of variation is the result of social change, only a causal relationship between them is sometimes direct, but in most cases is indirect。s rare for language purification Thus the usage of different patterns of languages such as the merging jargon and idiom and so on, became a slang used by Americans today. In the 20th century, the American slang with rapid development. The Two world wars, the Vietnam War, Korean War, the Cold War and other period have produced a lot of slangs, as well as continuing emerge social problems in American society, such as: racial discrimination, civil rights movement, family disintegration, the younger generation of alcohol and drug abuse, anti war movement, sexual freedom, homosexuality even more the United States emerged as slang, like bamboo shoots. As a munication tool ,and is rich and very dynamic position in English language, with the development of society, some slangs as no longer meet the munity benefit, no longer in use, slowly exit from the munity in this arena。 slang just like the jeans which has been widely accepted by mo