-a username for someone who is obsessed or has a fetish for ninjas
and that guy from the video game
-A username that which confuses others to believe that person is a guy, but is actually a girl.
Girl with a username, like NinjaGirl or something: "Hi, do u like ninjas too!? Omg, I love Link! Do u want to go private?"
NinjaLink: "...I'm a chick too, so no."