Extra strong; very high quality.
Designating extreme or hardcore pornography.
An indicator of hazard or poison.
Traditional brewer's mark for barrels of extra strong beer—extended to other alcoholic beverages and other products having an extra strong dimension (varying from laundry soap to pornography).
Triple X syndrome.
To delete; to cross out, especially to conceal or suggest vulgar language.
Offensive to good taste.
Generally unacceptable for public broadcasting but not legally obscene.
Not in keeping with conventional moral values; improper, immodest, or unseemly.