1. Group Identity and Belonging: Slang often serves as a marker of group identity. Using slang can signal that you are part of a specific group, whether it's a friendship circle, a particular age group, or a shared interest. This can strengthen bonds and create a sense of belonging.
2. Intimacy and Familiarity: Using slang can create a sense of closeness and familiarity. It can indicate that you are comfortable with the other person and that you share a certain level of understanding.
3. Efficiency and Condescension: Slang can sometimes be used as a shorthand way of communicating. Using a slang term can be quicker and more efficient than explaining something in detail. However, it can also be seen as condescending if the person you are speaking to doesn't understand the slang.
4. Humor and Playfulness: Slang can be used for humor and playfulness. Using a funny or unexpected slang term can make a conversation more enjoyable and lighthearted.
5. Expression of individuality: Slang can allow people to express their individuality and creativity. Inventing or using unique slang can help people stand out and be seen as more interesting or cool.
6. Social Pressure: Sometimes, people use slang because they feel pressured to fit in or be seen as cool. They might feel like they need to use slang to be accepted by a group or to avoid being seen as outdated or unfashionable.
7. Regional and cultural differences: Slang can vary greatly depending on region, ethnicity, and cultural background. Using slang can be a way of expressing your cultural identity or of acknowledging the cultural differences between people.
Ultimately, the reason why people use slang when they know others understand it is complex and often varies depending on the situation and the people involved. However, it is generally a way of building connections, expressing identity, and creating a more intimate and engaging communication experience.