From the famous comic, Calvin and Hobbes, it is one of calvins many alter egos. He flies around in a space ship in an unknown, but cruel galaxy where he crashes and meets many gross aliens. Bill Watterson(creator of C&H) created the character when he was in high school, where the name was "Spaceman Mort." It has now grown into the spaceman we know of as spiff. Bill Watterson has said Spiff is a parody of Flash Gordon, and the setting uses elements found in regular sci-fi.
We find Spaceman Spiff, interplanetary explorer extraordinaire, poised precariously over a percolating pit of putrid pasta
by Spaceman_Spiff May 22, 2009