Any Arab or member of an ethnic group that inhabits the desert regions of the Middle East, so-called for reasons unknown, but possibly because U.S. military forces are having just as difficult a time defeating them as they did the Vietnamese. Any genetic relationship between sand gooks and "regular" gooks is purely speculative at this time.
Charles: See, first we went to Vietnam to kill the gooks, now we've got to kill these fucking sand gooks. Then we're going to put out a special 75-page section in the newspaper devoted to my narcissism and filled with quotes I think are brilliant, but are really just the product of my wandering, irrational mind. This special section will be a way for me to compensate for my microscopic genitalia.