Golgafrincham was a planet, once home to the Great Circling Poets of Arium. The descendants of these poets made up tales of impending doom about the planet. The tales varied; some said it was going to crash into the sun, or the moon was going to crash into the planet. Others said the planet was to be invaded by twelve-foot piranha bees and still others said it was in danger of being eaten by an enormous mutant star-goat.
https://www.h2g2.com/entry/A2163520
http://toysrevil.blogspot.co.uk/2010/04/andy-yang-for-hitchhikers-guide-to.html
The name itself mutated and arrived via Morgan Pugh who named the original original jam band of my cousin Dan and I ‘Spacegoats’ c.1988 or 9. It was a natural extension to our pre. P.C. ‘Birth of the Cyborg’ saga.
The full name Morgan granted (among others like ‘Buffalo Jesus’) was ‘The Incredible Planet Eating Spacegoats’