boondocks (n.)youdaoicibaDictYouDict[boondocks 词源字典]
1910s, from Tagalog bundok "mountain." Adopted by occupying American soldiers in the Philippines for "remote and wild place." Reinforced or re-adopted during World War II. Hence, also boondockers "shoes suited for rough terrain," originally (1944) U.S. services slang word for field boots.[boondocks etymology, boondocks origin, 英语词源]