Pornographic or indecent.
Denoting a film given an X classification.
Designating extreme or hardcore pornography.
Extra strong; very high quality.
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.