demimonde star; sex industry idol
Colloquial/slang term for a popular figure in the adult entertainment or sex industry, often used in media or online contexts.
She was introduced in a magazine as a demimonde star.
ネットで話題の風俗アイドルがテレビに出た。
A demimonde star who was trending online appeared on TV.
Compound of 風俗 (sex industry) and アイドル (idol). The exact origin is uncertain, but it likely emerged in colloquial media to describe popular figures in the adult entertainment world.