yardbird

vankilakundi, häkkilintu

alokas puhekieltä A chicken.
puhekieltä A person who is imprisoned.
1985, John P. Conrad, "Charting a Course for Imprisonment Policy," Annals of the American Academy of Political and Social Science, vol. 478, p. 126:

The working convict is a rare exception, sometimes envied because his time is occupied, sometimes derided for his deviance from the yardbird norm.

As the Marines expanded to war strength, Lou Diamond was the ideal liaison between crusty old-timers and impressionable recruits. He taught quick action by threats of yardbird detail.