> when you passNihilism is not the belief that there is no God and life is ultimately meaningless.
Nihilism is recognizing that there is no God and life is ultimately meaningless, while continuing to sacrifice at a grinding job you hate, continuing to submit to the phony morality of those higher than you in the social hierarchy, conforming to social rituals and customs you privately think are bullshit, continuing to follow the rules of external authorities as if that might pay off in the afterlife.
Nihilism is understanding the truth, but pretending the universe is different than it really is, so you can evade personal responsibility for creating your own meaning.
Nihilism is behaving as if there is a God who gives life meaning, even when you don't actually believe that, instead of assuming responsibility for making your own meaning during the brief time you're alive.