In spaces surrounding fan fiction, STWW usually refers to Sexy Times With Wangxian, a now-deleted Mao Dao Zu Shi fan fiction from ao3 by author virtual1979 that became notorious for having over 2000 tags, most of which were things that made only very minor appearances. The author purposely abused the lack of a limit on tags to make it
extremely difficult for someone scrolling through fics to get past it, especially if they were on a phone.
Eventually the author tagged multiple fandoms that weren't related so that the work would infest those fandoms too, and despite marking her fic as complete she updated it almost daily. This seemed to be the final straw, as on May 31 of 2021 the fic was deleted by ao3. The reason for its deletion was not explicitly stated but most people theorize it had
something to do with the outrage caused by the absurd wall of tags that was the fic.