出典:Wiktionary
出典:『Wiktionary』 (2012/08/16 02:45 UTC 版)
出典:『Wiktionary』 (2025/05/29 17:27 UTC 版)
From yard + bird. Attested since 1956 in the sense of ‘convict,’ derived from the idea of prison yards. During World War II, it meant ‘basic trainee’ among the armed forces.