Trash talk is a form of verbal aggression that is used to intimidate or provoke an opponent. It is often used in sports, but it can also be used in other competitive situations, such as video games or even in the workplace.
Trash talk can be effective in throwing an opponent off their game and making them more likely to make mistakes. It can also be used to demoralize an opponent and make them less likely to want to continue competing. However, trash talk can also be seen as unsportsmanlike and disrespectful, and it can lead to conflict or even violence.