Etymology: Mary-Sue + Anbu
1. A Mary-Sue found specifically within the Naruto fandom.
2. A Mary-Sue who is a ninja and probably is, or once was, or might as well be, a member of Anbu.
Much to the disgust of the readers, the Suebu had extremly large breasts and caught the eye of every male ninja in Konoha.
New fanfic authors are overpowering good Naruto fanfiction with their Suebus.