Have you ever read Jabberwocky?
http://www.jabberwocky.com/carroll/jabber/jabberwocky.html
As stated in above comments it's about writing a story using a lot of invented words and yet still tying together something like a story. The idea is that the reader uses their own imagination with the made up words and in doing so takes the poem to a personal level that the poet could not normally achieve.