> "Blackpilling" is apparently an incel term for fatalism/nihilism

Any idea as to the etymology? What was the black pill? Is it a Matrix reference?

Meta: why are incel neologisms so catchy?

I think (but I don't move in such circles) that originally there was "redpilled" to refer to people playing "The Game" (pickup artists). Original reference is to The Matrix, of course.