Rare, literary term for a nickname or alias. The cross-reference 綽名 (しゃくめい) is a more common synonym. This word is seldom used in modern Japanese; あだ名 or ニックネーム are the usual terms.
See also: あだ名
The word 綽号 can be found in old documents, but it is hardly used today.
Common loanword for 'nickname', often used in casual or online contexts.
The exact derivation is uncertain. The kanji 綽 (しゃく) means 'loose' or 'generous' and is rare; 号 (ごう) means 'name' or 'title'. The combination may have been used historically to refer to an informal or alternate name.