the.com/satanism

means A modern religious/philosophical movement that mostly uses Satan as a symbol of rebellion, individualism, and rejection of religious authority—not literal devil worship.

from The word traces to Hebrew 'satan,' meaning 'adversary' or 'accuser,' via Greek and Latin into English. 'Satanism' as a label dates back centuries as a slur Christians threw at heretics and witches, almost always describing accusations rather than actual organized belief. The modern movement most people picture—LaVeyan Satanism—was founded in 1966, explicitly atheistic, using Satan as a literary symbol of self-determination rather than a being to worship. So the word carries two very different histories: one of panic and projection, one of deliberate, tongue-in-cheek provocation.