Warhammer 40,000 memes stem from the vast, 'grimdark' universe created by Games Workshop, characterized by its over-the-top violence, religious zealotry, and cosmic horror. Common themes include the Inquisition's obsession with 'heresy,' the fanatical devotion of Space Marines to the God-Emperor, and the endless war between various factions like the Orks, Chaos, and Eldar. These memes often use hyperbolic language and iconic imagery—such as the 'Exterminatus' button or an Inquisitor pointing out heresy—to satirize the setting's extreme darkness or to apply its rigid logic to real-world situations. The community thrives on inside jokes about painting miniatures, the lore's complexity, and the sheer absurdity of life in the 41st millennium.