Gook (/ˈɡuːk/ or /ˈɡʊk/) is a derogatory term for people of East and Southeast Asian descent.^[1] Its origin is unclear, but it may have originated among U.S. Marines during the Philippine–American War (1899–1902).^[2][3] Historically, U.S. military personnel used the word “to refer to any dark-skinned foreigner, especially a non-European or non-American.” ^[4][5][6] The earliest published example is dated 1920 and notes that U.S. Marines then in Haiti used the term to refer to Haitians.^[7] It was widely used in Asia in both the Korean and Vietnamese Wars.

The Oxford English Dictionary states that the origin of the word is unknown.^[8] "The Marines who occupied Nicaragua in 1912 took to calling the natives gooks. In 1920, it was reported that U.S. Marines in Haiti used the term to refer to Haitians.^[7] An earlier usage of gook, recorded in a slang dictionary published in 1893, defined gook as "a low prostitute".^[9]

The earliest use of the word in the English language comes from the name of a traditional Cornish Bonnet.^[10]

The usage for Koreans possibly comes from the Korean word "국" (guk), meaning "country",^[11] "한국" (hanguk), meaning "Korea", or "미국" (miguk), meaning "America".^[12] U.S. soldiers in the Korean War might have heard locals saying miguk (미국), referring to Americans, and misinterpreted this as "Me gook."^[13]

The origin of gook is unclear, but it may have originated among U.S. Marines during the Philippine–American War (1899–1902).^[2][14] Historically, U.S. military personnel used the word to refer to non-Americans of various races.^[4] The earliest published example is dated 1920 and notes that U.S. Marines then in Haiti used the term to refer to Haitians.^[7]

During World War II, U.S. troops fighting on the Pacific Front occasionally referred to the natives of Pacific Islands as gooks. The term appears in the 1943 film Guadalcanal Diary, when one of the characters of the film refers to the titular setting as "gook island".^[15]

When U.S. troops were stationed on the Korean Peninsula at the outbreak of the Korean War, so prevalent was the use of the word gook during the first few months of the war that U.S. General Douglas MacArthur banned its use, for fear that Asians would become alienated to the United Nations Command because of the insult. In spite of MacArthur’s early prohibition, the term was nonetheless used by U.S. troops during the conflict, and U.S. postwar occupation troops in South Korea continued to call the Koreans "gooks".^{[16][2][17][18]}

The term was also used by non-American troops during the Korean War as well. The posthumous Victoria Cross citation for British Army major Kenneth Muir, who was killed in action at the Battle of Hill 282, stated that his last words were "The Gooks will never drive the Argylls off this hill."^[19]

In modern U.S. usage, "gook" refers particularly to communist soldiers during the Vietnam War and has also been used towards all Vietnamese and at other times to all Southeast Asians in general. It is considered to be highly offensive. In a highly publicized incident, Senator John McCain used the word during the 2000 presidential campaign to refer to his North Vietnamese captors when he was a prisoner of war: "I hate the gooks. I will hate them as long as I live… I was referring to my prison guards and I will continue to refer to them in language that might offend." A few days later, however, he apologized to the Vietnamese community at large.^[20]