(dated, humorous, slang) A mock deity of early science fiction fandom; a fannish ghod.
“Why in the name of Ghu should we want to?” asked Thak in amazement. 1991, Peter David, The Rift, →ISBN, page 189:
"Great Ghu!" said Dorothy. "Why, this must be the True Fandom that I've read about! Where everyone is a fan, even the animals and machines and all!" 1959, Terry Carr, Ron Ellik (as Carl Brandon), “The Scarecrow”, in The BNF of Iz, archived from the original on 21 Jul 2013:
Neofans and old ones too/Shout the praise of the Great Ghod Ghu, 1956 November-December, Walt Leibscher, “Go, Fan, Go”, in Science-Fiction Five-Yearly, number 2, page 32: