List of United States Marine Corps Acronyms and Expressions - J

J

• JAG – Judge Advocate General, colloquial name for the legal entity within the Marine Corps, more properly called Judge Advocate Division, from the Judge Advocate General of the Navy, the naval officer who oversees both the Navy's and Marine Corps' legal entities; also, a television show by the same name.

• jarhead – pejorative term for a Marine. Jarhead has several supposed origins: the regulation "High and Tight" haircut resembles a mason jar (to add insult, some note that the jar is an empty vessel, also therefore a Marine's head an empty vessel); the Mason Jar Company stopped making jars and made the helmets for Marines during World War II.

• Jesus slippers or Jesus boots – government-issue sandals or flip-flops for sanitation in showers. See also shower shoes.

• JETDS – Joint Electronics Type Designation System, used to categorize the nomenclature of electronic equipment.

• JJ DID TIE BUCKLE – mnemonic for the 14 leadership traits: Justice, Judgement, Dependability, Initiative, Decisiveness, Tact, Integrity, Enthusiasm, Bearing, Unselfishness, Courage, Knowledge, Loyalty, Endurance.

• JOB – Junk On the Bunk, a formal inspection of gear that takes place in the squad bay where the gear is placed on the rack in a predesignated order. Also known as 'Things On the Springs'.

• joe – coffee, so named because United States Secretary of the Navy Josephus Daniels eliminated beer and wine from naval ships, declaring nothing stronger than coffee would be allowed.

• John Wayne – P-38 can opener, a small folding blade used to open canned rations (such as K-rations or C-rations), so named because the actor was shown in a training film using it.

• Joker – military journalist, from Private Joker from the movie Full Metal Jacket; also a derogatory term for a junior enlisted servicemember. Also, used by aviators, the time at which only 60 minutes of fuel remain.

• JTF – Joint Task Force, a provisional unit or formation from more than one branch of service.

• jungle bunny – Vietnam War–era phrase for infantry.

• junk on bunk – inspection where all uniforms and equipment to be displayed is laid on the Marine's rack.