WOG - Navy slang for someone who has not crossed over the equator on a cruise. Short for Pollywog. If you do cross the equator, you go through a humiliating and painful ritual to become a Shellback, a higher form of life (this is according to Navy tradition).
Fun stuff during the day-long ritual includes crawling through a tube full of week-old garbage (and other wog's barf), crawling on your hands and knees across metal and non-skid coated floors, getting hosed down with seawater at 2AM, and other things too grotesque to recall.
This ritual has been watered-down with the current climate of politically-correctness.