5.22.24 Adam News and Info

It comes from the Three Body Problem books by Cixin Liu (super-popular in China, but also internationally). In particular, the 3rd book, "Deaths End".

In short, nasty aliens devastate other civilizations using a weapon that reduces their space's dimensions, e.g. a 4D space is turned into 3D space, or in our case 3D space flattens into 2D space, basically destroying everything and everybody in the Solar System.

In the context of the show, it means "so powerful you cannot win", or "unstoppable".