What Is a Poison Pill?

Twitter has taken a 'poison pill' to fend off a hostile takeover. The move allows existing shareholders to buy shares at a significant discount. It dilutes the shood out of the person that is trying to take over the compni think it's more like giving them voting shares to not allow this to happen. This, in this case, an i forgot what a poison pillow is, but i think in the case of twitter, that's what it's doing. There was people this week end saying, elon musk just landed a spaceship, like, took off a space rocket and landed it right back on the pad. Like, how could he not run twitter? And my