A lot of the things that are fun about a language are also ribald, violent or otherwise inappropriate for polite company.
So, the Surusu URL Shuffler now has a separate “deck”-like structure to/from which you can add and retrieve links that are of this kind, i.e. NSFW.
Scroll down to the near the of the URL shuffler page for the relevant bookmarklets. You can’t miss them.
I see the option to add multiple NSFW URLs, but not the option to add just one. Basically I just want a way of creating two separate and distinct shuffler lists (without switching decks), so maybe there is another way to do this.