x-rated (for adults, for a mature audience) — на этот фильм дети до 16ти лет не допускаются; детям до 16 вход запрещен

Born Loose is an x-rated video. It contains nudity and sex.

— Guest

The term x-rated was first designated for films. X-rated movies had full nudity and also could contain graphic violence. X-rated movies are considered pornographic.

In the United States, only individuals 18 or older can attend x-rated movies.