n. 绰号

[ noun ]
a familiar name for a person (often a shortened version of a person's given name)
<noun.communication>
Joe's mother would not use his nickname and always called him JosephHenry's nickname was Slim

Sobriquet \So`bri`quet"\ (s[-o]`br[-e]`k[asl]"), n.[F.
sobriquet, OF. soubzbriquet, soubriquet, a chuck under the
chin, hence, an affront, a nickname; of uncertain origin; cf.
It. sottobecco a chuck under the chin.]
An assumed name; a fanciful epithet or appellation; a
nickname. [Sometimes less correctly written {soubriquet}.]