Slang, idiom, expression, argot, jargon, colloquialism: what is it?

To improve your knowledge of U.S. slang, this website is really good. Another good reference is the Urban Dictionary.

Slang, idiom, expression, argot, jargon, colloquialism:
Either a printed or online dictionary will tell you what each of these words mean. Some definitions may differ, but these words all generally refer to language as it is normally used by native speakers. This everyday language differs from academic language in important ways. The vocabulary of formal, academic English language is quite fixed and slow to change. Words have well-defined meanings that change little over time. However, everyday English changes constantly. Words used today were unknown yesterday. Yesterday's slang sounds archaic today. Some idioms are completely arbitrary, like "P,U." Every American pre-schooler knows this means something stinks! What do the initial letter stand for? No one knows for sure.

One function of colloquialisms is to establish and maintain a community. The community is people who understand and use certain slang expressions, Insiders know the what it means to "pay lip service." If you are an insider, you can understand the intended meaning of the expression that lies beneath the meaning of the individual words. If you are outside the community, you may understand the words but not understand the underlying meaning they way insiders do. For example, the community of people born or growing up in the U.S. constantly use slang, idioms, and similar expressions which exclude non-native speakers. People outside the community cannot usually penetrate colloquial expressions very easily.

Another function of slang is to provide a platform for humor. Since the actual meaning of the expression may be the opposite of the literal meaning of the individual words, people using these kinds of phrases often have an ironic intent. To understand humor in English, non-native speakers need a broad understanding of the most common expressions. These expressions are known since childhood by native speakers but continue to baffle non-native adults.

One good way to discover these expression is to read a U.S. general interest magazine, such as Time magazine, Readers Digest, or National Geographic. If you have not lived all or most of your life in the U.S., though you understand the individual words and grammar, the overall meaning of the magazine articles remains elusive. That is because vital parts of the meaning are contained in the slang, idiom, expression, argot, jargon, or colloquialism used in speech and writing.

Please let me know your own experiences with English slang. How have you tried to learn common expressions and idioms? You can email me directly by clicking here. Also, please give me any feedback you can so I can keep improving. Thanks!