In case, you're not familiar with the Loss comic, it's this: https://en.wikipedia.org/wiki/Loss_(Ctrl%2BAlt%2BDel)

TL;DR: It's an unexpectedly dark comic (hence the psychic damage), and it turned into somewhat of a meme to try to remind people of it, by producing ever more abstract representations of it.
For example, you can post ~~:.|:;~~ here on Lemmy and someone will probably recognize it.

The dad is creating such an abstract representation by arranging knives.