Spider

Of course, “spider hole” was not concocted to describe Hussein’s hideout. According to two historians, the term goes back at least to World War II, when it was used by Marines and Army troops fighting in the Pacific.

…Applied to Hussein, the term is somewhat misleading, since Hussein reportedly was using his hole for concealment rather than sniping, and he surrendered without a fight. In metaphorical terms, he was more like, well, a chicken in a basket. But spider hole is more accurate than foxhole, which Chuck Melson of the Marine Corps History and Museums Division says goes back to the Civil War, and which typically describes a hole dug quickly, not camouflaged and used by soldiers to protect themselves from enemy fire.

Thanks to the Washington Post for answering this question!!!