Zarquon

Zarquon is a legendary prophet in the 5-part fictional "trilogy" The Hitch Hikers Guide To The Galaxy, by Douglas Adams. He is apparently worshipped or held in some religious significance by one or more of the Galaxy's major religions. His name, like that of Jesus on Earth, is frequently invoked as an expletive of surprise, anger, or awe.

Exactly what Zarquon taught is unclear; most of the Zarquon mythos centres around a prophecied Second Coming of the Great Prophet Zarquon, although this is often invoked in the sense of "never" (like, "when hell freezes over"). Zarquon's second coming does actually occur--at the Restaurant at the End of the Universe[?]. Since the said restaurant occurs an infinite number of times at the end of the universe, due to a specially created time-loop, Zarquon's impossible appearance at the restaurant became finitely improbable, and therefore happens just before the universe ends.

The second coming is not particulary spectacular, and Zarquon turns out to be a bit distracted and hurried when he arrives. He had a lot of things to do, and apologizes for being late, but disappears before he can say much because the Universe ends.

"Holy Zarquon's Singing Fish" is an expletive phrase used, but not explained, by Zaphod Beeblebrox when he faces extreme danger.