Gaslighting = trying to drive someone else crazy, literally. Because it makes you feel powerful. In control.
Watch this video. When he says that she is 30 minutes late for their first dinner, that’s when it starts. She was not late at all, but he wants her to start doubting herself. That’s gaslighting. Gaslighting also includes telling the people around you lies about you and getting them to abuse you too. Such people are called “flying monkeys”. It’s intended to help isolate the victim because that makes it possible to take the psychological abuse up a few notches. You can see that in this video as well.
Anyone who considers this kind of abuse hilarious should see a mental health professional. Because you may need to learn some techniques for how to modulate your behavior. That could be really helpful.