There are many slang words and phrases created by Russian immigrants. When the various countries that used to make up the then U.S.S.R. (Union of Soviet Socialist Republics) broke apart, there came a dialect that soon became known as Russian immigrants slang. It is a melting pot of colloquialisms native to those countries that once upon a time made up Russia.
To an untrained ear and a closed mind, Russian slang would probably not be of interest. However with the influx of Russian immigrants residing in America and other countries, it may be of interest to at least be familiar with the slang of the ethnic group. If nothing else, you may be able to pick up keywords should you ever find yourself in the midst of a Russian section of town or even in a Russian-speaking country.
Some the slang terms may be considered as rude or inconsiderate by traditional American standards, however this is simply meant to give information. Many of the slang words may not be in the Russian dictionary. You may, however, find many of them referred to as modern Russian slang.
As you read the slang terms it is advised that you use common sense and good judgment prior to uttering any of the slang in a public place. Much of the slang native to the Russian language and culture is rather derogatory and can be seen as an expletive. Use caution. The words listed above are listed in their English version regarding spelling and definition. For the Russian spelling of the word, you should go on the Internet and visit a Russian-English Slang Dictionary.