Jack Nastyface Naval The nom-de-plume of a sailor who published pamphlets in 1805-35 about the evils of the press-gang and naval life generally. He had fought at Trafalgar.
Jack Tar Naval An old civilian name for a sailor; probably derived from the black 'tarpaulin' hats worn between 1857 and 1891 (boater-shaped with cap-ribbon round the crown). Another theory explains the word JACK as a diminutive of Jacket (i.e. meaning a short jacket), the TAR referring to the old sailors' practice of waterproofing their clothes with tar.
Jaunty Naval The traditional nickname for the Master-At-Arms, the chief of the ship's police. At the end of the XVII century the Master-At-Arms was the Small Arms Instructor and also responsible for the minor organisation of the ship's company; he lost this latter responsibility when Commander's Offices were introduced in about 1926. The name "Master-At-Arms" first appears in about 1860. The name "Jaunty" is said to be a corruption of the French GENDARME, which, aglicised, became John Damme
Ji India A suffix attached to names to indicate reverence and/or affection.
Jib Naval Cut of his jib. A maritime phrase descriptive of a person's facial appearance. It comes from the days of sail when a ship's nationality could be told at a distance by the cut of her sails.
Jihad India/Middle East/North Africa A Muslim religious struggle or crusade.
Joey Naval One of the many common nicknames for Royal Marines when used in the plural: in the singular it now usually refers to the Royal Marine Officer. The name as applied to the Royal Marines is said to be a corruption of JOSEPH - from the Joseph of the Old Testament, not an account of his coat of many colours but for his all-round efficiency.
Jose Naval The sailor's name for any Maltese man, whether Service or civilian.
Jose Far East Luck, the chinese pidgin-english form of the Portuguese "Deos", a god. Used in the expressions "Good Joss" or "Bad Joss". At one time, Plymouth Gin in China was commonly known as JOSSMAN, from the picture of a monk which adorns the label.