Extra strong; very high quality.
Designating extreme or hardcore pornography.
To delete; to cross out, especially to conceal or suggest vulgar language.
Triple X syndrome.
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).
Suggestive of sexual impropriety; bordering on the indelicate.