https://www.military1.com/basic-training/article/403808-what-are-some-commonly-used-military-slang-words/FUBAR - F***** Up Beyond All Repair: A description of many differing items and people
Marine Corps socket set - An adjustable wrench
Wingnut - A member of the US Air Force
Squid/squidee/swabbie/swab jockey - Affectionate terms used by members of other service branches to describe members of the US Navy.
Bravo Sierra (BS) - Initials for the word "Bullshit"
First Shirt - First Sergeant (Usually the senior NCO within a military unit)
Ground Pounder - A term used to describe a military member in the armed forces whose primary job is being an infantry member.
Rack - Navy/Marine Corps: A bed (particularly on a ship)
Rack time - Sleeping (See also rack)
Outstanding - A superlative used by members of USMC to describe most things.
Unsat - Short for "Unsatisfactory": Used by members of the USMC to describe anything )people,facilities,etc) which are not up to par.
Errr... - (U.S. Marines) An abbreviated or unmotivated "Oorah". Often used as a form of acknowledgment or greeting. Yes, we really do walk around saying "Errr" at one another in the way normal civilized humans say "Hello."
And other notable euphemisms.
5 fingers of death - (US Army, US Marines) Another name for the MRE beef franks, so named for their number and unpleasant taste. Also known as "Beans and motherf******" for the same reason. Later versions of this meal only contained four beef franks without any beans or sauce and were subsequently nicknamed the "4 d**** of death".
BGB - (US Navy and Marines) Big Gray Boat. Refers to large ships, e.g. carriers and battleships, that are gray in color.
Bird, Ball and Chain - (US Marines) Cynical term for the Marine Corps' Eagle, Globe and Anchor emblem.
boot - Someone lacking in experience. A reference to "boot camp".
broke-dick - (US) A soldier with a medical condition that would hinder the soldier's ability to perform certain tasks; alternatively, equipment that is not operationally ready.
bulkhead - (US Navy, Marines, RCN) The interior structural divider of a ship; used ashore to refer to the interior walls of a building, as well.
Bullshit flag, throwing the - (US) Challenging the factual accuracy of another's statement.
cammies - (US Navy and Marines) Camouflage utility uniform. What are referred to as "BDUs" in the Army and Air Force.
cheesedick - (US Marines) To do something with minimal effort. As in "He cheesedicked his way through it."
chem light batteries - (US Marines) A form of snipe hunt. To have a new Marine search for obviously non-existent batteries for chemical light sticks.
dark green - (US Marines) An African-American US Marine; as compared to a "light-green". Intended to promote a sense of oneness among Marines "All Marines are green." Becoming an archaic term; sometimes perceived as offensive instead.
Devil Dog - (US) US Marine. The term comes from a (possibly apocryphal) complimentary term,Teufelhund, applied by German soldiers to Marines during World War I for fighting like shock troops.
firewatch ribbon - The National Defense Service Medal, which is given to all members of the military during a wartime event. It is presented during bootcamp and everyone gets one, so among the military people serving beside you... no one cares. Firewatch is a reference to the guard duty you do while at bootcamp.
Good Cookie - The Good Conduct Medal, which is presented to naval and Marine Corps personal for every three years of service without a major disciplinary offense.
Grape - 1. (US Submarine Service) Delightfully easy. Examples: "This is %$# grape duty! I %$# love it!" or "That was a grape sig, you %$#." (See "sig" below)
2. (US Marines, Army) One's head. For example: "Put your cover [hat] on your grape."
3. (USAF Fighter Pilots) : an aircraft/pilot that is easy to shoot down.
4. (US Navy) : The flight deck crewmen on an aircraft carrier tasked with fuel handling (so called for their purple shirts and helmets) . Related to "skittles".
Hump - Walking with a pack approximately half your body weight from one location to another, not to be confused with the similar activities performed unto dog owners by their K9 companions.)
ID10T Form - (USAF/USMC) Idiot form. A non-existent form that ignorant airmen/marines are sent to find. Usually they are new to their unit.
Lance Coolie; Lance Criminal - (US Marines) Cynical terms for Lance Corporals, the third-lowest enlisted rank in the Marine Corps.
Lance Corporal Underground - (US Marines) refers to what the junior enlisted are saying or feeling; a more informed rumormill.
Last Cleaning Position Left - (US Marines) A play on the abbreviation "LCPL" for Lance Corporal, the highest non-NCO rank. Used to remind a Lance Corporal that they are still subject to having to clean.
libo - (US Navy and Marines) Liberty, time away from work (after hours, on a weekend, during a port-call, etc.) not charged against leave.
Master Guns - (US Marines) Master Gunnery Sergeant; (US Navy) Gunners Mate Master Chief
Moonbeam - (US Marines) A flashlight. We are just as confused as you are.
"OFP" - (US MARINES) Own F****** Program, a term given to a marine who doesn't follow an order given or is not following the marine corps standard.
On the double - (US Navy, Marines) As quickly as possible; without delay.
Oorah! - (US Marines) Term used to respond in the affirmative to a question, acknowledge an order, or generally to express enthusiasm. Comparable to "Hooah" in the Army.
Oscar-Mike - (US) On the Move, from the phonetic alphabet.
Perfect for Cleaning; Personnel for Cleaning - (US Army and Marines) Unenthusiastic synonyms for Privates First Class (PFCs) in the Army and the Marine Corps.
Professional F****** Custodian - (Marine Corps) Private First Class, usually used during field day.
rack ops - (US Marines) The time for sleep, if permitted, while in the field.
"...Since Jesus was a corporal" - (US Army and Marines) For a very long time. e.g.: "I haven't been home since Jesus was a corporal."
Shitbird - The guy in the unit everyone hates for making life harder on everyone.
Top - (US Army and Marines) The First Sergeant or Master Sergeant (USMC), senior enlisted man at company level.
Turtle f***(ing) - (US Marines) Striking a Marine on his helmet with another helmet. The clunking of the two kevlar helmets sounds like two empty shells hitting. Sometimes done deliberately among friends, but often as a joke to an unsuspecting trooper.
Twentynine Stumps - (US Marines) Marine Corps Air Ground Combat Center Twentynine Palms, California. Often simply referred to as "the Stumps."
Unf*** - (US Army, Marines) To bring something or someone into proper order and accord with SOP.
