gow (n.)youdaoicibaDictYouDict[gow 词源字典]
1915, "opium," from Cantonese yao-kao "opium," literally "drug-sap;" used as such by Raymond Chandler, etc.; by 1950s the meaning had expanded to "pictures of nude or scantily clad women," hence gow job "flashy girl," which in teenager slang came to also mean "hot rod."[gow etymology, gow origin, 英语词源]