* Slang is constantly evolving: New words are created, old ones fade out, and meanings change all the time.
* Regional variations: Slang differs greatly from region to region, even within the same country. What's slang in one area might be completely unknown or have a different meaning elsewhere.
* Subcultures and groups: Slang is often specific to certain groups, like teenagers, gamers, or professional communities. These groups constantly create and evolve their own unique vocabulary.
* Difficult to define "slang": It's hard to draw a clear line between slang, informal language, and technical jargon.
Instead of a number, think about these factors:
* Vastness: There are likely thousands of slang words and phrases in use across the world.
* Dynamic nature: The number is constantly changing.
Think of slang as a living, breathing language phenomenon.