In a poem titled "Jabberwocky" in the book Through the Looking-Glass and What Alice Found There (1872), Lewis Carroll warned his readers about a frightful beast:

Beware the Jabberwock, my son!

The jaws that bite, the claws that catch!

Beware the Jubjub bird, and shun

The frumious Bandersnatch!

This nonsensical poem caught the public's fancy, and by 1902 "jabberwocky" was being used as a generic term for meaningless speech or writing. The word "bandersnatch" has also seen some use as a general noun, with the meaning "a wildly grotesque or bizarre individual." It's a much rarer word than "jabberwocky," though, and is entered only in our unabridged dictionary, Webster’s Third New International.