Zog is a character from the Teenage Mutant Ninja Turtles Universe.

Zog of Albania

Zionist Occupation Government, an entity postulated by some anti-semitic movements to be a worldwide government

ZOG (hypertext)

ZOG is a word and three-letter abbreviation with multiple meanings, as described below:

Planet Zog, where Spaceman Spiff, an alter ego of Calvin makes a (very rare) perfect three-point landing.

Planet Zog, home planet of the Evil Gollarks in the Murderous Maths series of books, Zig and Zag and also a general name for any sci-fi planet.