bogon
n.— «ISPs and major backbones don’t effectively prevent bogon (unallocated and unannounced) IP space from traversing the wide Internet.» —“A peek at script kiddie culture” by Andrew D. Kirch NewsForge Mar. 5, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...