R-rated

adjective3

1. •
   Of a motion picture, having an "R rating" from one more motion picture rating authorities, typically meaning it is suitable only for adults.
2. •
   (US) Of a motion picture, having an "R rating" from the Motion Picture Association (MPA), meaning it is suitable only for adults.
3. •
   (informal) Not suitable for children, especially due to involving excessive sexual, violent, or rude content

   • A day’s notes are routinely R-rated. “Usually tense relationships are moderated by ritualized greetings and a genital grab,” she said. — 2017