buggy (n.)youdaoicibaDictYouDict[buggy 词源字典]
"light carriage," 1773, of unknown origin. Extended to baby carriages by 1890.[buggy etymology, buggy origin, 英语词源]
buggy (adj.)youdaoicibaDictYouDict
"infested with bugs," 1774, from bug (n.) + -y (2).