Wiktionary
adult content
n. Content, such as pornography or violence, that is not generally thought to be appropriate for viewing by children.
Usage examples of "adult content".
They were still sweating when they went out to a noisy little soft-bar-no alcohol in this establishment, which had strict rules about doing the ride straight There was a place down in White Sector that didn't check sobriety, and that had a lot wilder adult content than the Old Man would like to know about, JR strongly suspected.