I'm sure most of you will know what "red pilling" someone means, but if not here is the definition of it in the "slang dictionary" of Dictionary.com: "Red pill refers to the truth behind a situation, especially a truth that is difficult to accept".
Dictionary.com explains: "There's a scene early on in the movie in which the main character, Neo, is offered two pills: a red one and a blue one.
The red pill represents an awakening, but one that could be difficult and painful.
Neo's world will be changed uncomfortably if he takes the red pill, but he'll be made aware of the truth of the world.
It all started 9 hours ago (from the time of writing this) where Musk tweeted: "Take the red pill", to which Ivanka Trump responded within an hour saying "Taken!"