Older generation insists on that people should speak clear and correct english/russian or any other language. while younger generation uses a lot of slang in their speech and thinks that they are making the language more colourful this way. составить аргументы за и против сленга, , а в идеале напишите эссе,

The older generation insists that young people should speak clearly and correctly in their native tongue. Instead of calling your friend holmes or home boy, call him by his given name like Jimmy or Johnny.
Remember that a dog has four legs and barks and shouldn't be used is polite company when addressing Jimmy or Johnny.