Thanks, Bye

The term can also be used to indicate extreme decisiveness or self-confidence. In this sense it is not antagonistic, but rather a way of injecting a greater sense of assertiveness and urgency into a statement.

when someone tells you information that you really dont care about.
or when someone is giving you a big lecture when you do something bad and you reply with a K THANKS BYE

When you need to abruptly end a conversation and have simply had enough contact with other humans. It can be used to end a conversation at any point, and is especially useful if the person is repeating themselves.