Many of the pastas have nicknames for Slenderman. Some of them are Slender, Slendy, Slenderp, Slenderdude, and many more.

Slenderman doesn't mind most of them or he just ignores them. However, the one he can't stand is Slenderdude.

The nickname Slenderdude was created by kiwiharvester in her Eyeless Jack x reader story the swimming pool.