sobriquet (n.)youdaoicibaDictYouDict[sobriquet 词源字典]
1640s, from French sobriquet "nickname," from Middle French soubriquet (15c.), which also meant "a jest, quip," and is said to have meant literally "a chuck under the chin" [Gamillscheg]; of unknown origin (first element perhaps from Latin sub "under").[sobriquet etymology, sobriquet origin, 英语词源]