subs. phr. (nautical).—Yellow fever. [A yellow flag (or jack) being generally displayed at naval hospitals, or from vessels at quarantine, to denote the existence of contagious disease.]
1848. DICKENS, Dombey and Son, x. His elder brother died of YELLOW JACK in the West Indies.
1857. C. KINGSLEY, Two Years Ago, iv. Have seen three choleras, two army fevers, and YELLOW-JACK without end.
