A Vogon poem is a type of poem invented by writer Douglas Adams in his science-fiction fantasy series The Hitchhiker's Guide to The Galaxy. Known first and foremost for their bureaucratic unpleasantness, Vogons are fictional aliens who come from the planet Vogsphere to tear down the Earth to build an intergalactic highway express route in its place. One of their most famous traits is the fact that they write "the third worst poetry in The universe."
In different iterations of The Hitchhiker's Guide, from Douglas Adams's BBC radio series to a Hitchhiker's Guide interactive fiction game which was later made by Infocom, several different examples of Vogon poetry can be found. One poem's reading is said, in Adams's imagined universe, to have been so bad that it killed four audience members from internal bleeding when it was read.
Stylistically it is loosely comparable to nonsense verse, and may bring to mind another famous poem, Lewis Carroll's "Jabberwocky."