Slang refers to informal and colloquial sentences among the people, and it is an easy-to-understand and local-colored word summed up by the people in their daily lives. Strong regionality and rejuvenation. Slang is an informal language, usually used in informal situations. Sometimes slang is used to express new things or give new words to old things.
Most sub-cultural groups like to absorb words from the languages they often contact and give them new meanings, while others borrow foreign languages and rarely form their own words. Therefore, the formation of slang, like other words, adopts metaphor, simile, folk etymology, phonetic change, semantic expansion, semantic reduction, deletion, abbreviation, praise and criticism, metonymy, exaggeration, loanword and euphemism (special) to prevent taboos.