The Vogons were an alien race in The Hitch Hiker's Guide To The Galaxy by Douglas Adams. The archetypal slimy green alien, vogons are more bureaucratic and callous than actively evil.

The main Vogon to appear in the books is Prostetnic Vogon Jeltz, amateur poet and head of the fleet of ships assigned to demolish the Earth, to make way for a hyperspace bypass; and who later orders Arthur Dent and Ford Prefect to be thrown out of an airlock.

Incidentally, while Vogon poetry is the third worst in the universe, and the second worst definitively is that of the Azgoths of Kria in all versions of the book; the worst - the poetry of Paula Nancy Millstone Jennings was, in early versions and the radio series, that of Paul Neil Milne Jennings until Jennings, a schoolfriend of Adams, complained.

mkb reminds me that the vogon brain evolved from a misplaced, dyspeptic liver...