The story
Initialism of underground + subliminal + community.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A decentralized online subculture focused on the creation and consumption of "underground" subliminal audio tracks, often containing affirmations for harmful, lethal, or prohibited outcomes (such as self-harm or psychosis) to evade platform moderation. Full definition →
Initialism of underground + subliminal + community.
Etymology from Wiktionary, CC BY-SA 4.0.