doxy (n.)youdaoicibaDictYouDict[doxy 词源字典]
"rogue's girlfriend," 1520s, slang, of unknown origin (see dell (n.2)). Liberman says it is probably from Low German dokke "doll," "with the deterioration of meaning from 'sweetheart' and 'wench' to 'whore.'" [doxy etymology, doxy origin, 英语词源]