Military lingo

10 military terms that made it to the civilian vocabulary


Published on June 25, 2026


Image: Filip Andrejevic

Our everyday vocabulary is littered with terms, phrases, idioms, and concepts drawn from different contexts—such as medicine, science, sports, politics, etc.—often altered or reinterpreted. The military world is no exception, and every day we use phrases that originated in war contexts or that were popularized by soldiers. Let’s have a look at some examples!

1

ASAP

Image: ostudio

One of the most widespread phrases popularized by military use, this acronym originated not in the armed forces but in the dental hygiene field as part of a list of recommended abbreviations for secretaries. However, it was adopted by the military around the 1950s and widely used during the Korean War. While it was conceived to mean "as soon as practically possible", its use in the military context shifted its meaning to "immediately".

2

No man’s land

Image: Alex Streif

Have you ever described an ambiguous or unclear situation as "no man’s land"? Well, that phrase was initially used for actual land, and it is still used that way. Popularized during WWI as a descriptor of the barren land between opposing trenches, it had been in use for centuries for unoccupied or unclaimed wastelands, often in dispute among bordering jurisdictions. While we now often use it figuratively, it is used in its literal sense in conflict zones and territorial disputes.

3

Deadline

Image: Towfiqu barbhuiya

Our modern life is hectic and filled with deadlines, but these, although important, don’t usually pose a threat to our lives. The original deadlines, though, were a different story. The phrase emerged during the American Civil War, and it referred to the boundary lines drawn around prisoner camps. Any prisoner who crossed the line was instantly shot, effectively making it a ‘deadline’. Luckily for us, its meaning has shifted to reflect a time limit.

4

Cup of joe

Image: Emre

If you ever wondered about the connection between coffee and someone named Joe, several theories claim to have the answer. The most popular one —although refuted by many historians— links it to Josephus "Joe" Daniels, famous for banning alcohol in the Navy, which allegedly popularized coffee as a substitute. A more likely theory points to the term ‘jamoke’ (a contraction of java + mocha), widely used in the military around the 1930s.

5

Feeling blue

Image: Joanna Derks

The color blue has traditionally been associated with melancholy, but military men might have had a hand in popularizing this idiom. Though blue flags currently carry a different meaning in nautical terminology, they were once used as a sign of mourning. If a ship’s captain or other high-ranking officer died at sea, their ship would fly a blue flag and paint a blue band around the hull, a custom that intertwined the color blue with sadness.

6

AWOL

Image: Vaz Mann

If we think about it, most of the time we say someone’s AWOL, a leave is not required. We are simply stating that we don’t know where they are or why they left. But the case is quite different for its military use. First recorded in the 18th century, it was used as a full phrase, although it eventually became an initialism around WWI and then an acronym around WWII. Still in use in the military, it carries a more dire meaning than in the civilian context.

7

Murphy’s law

Image: Sarah Kilian

"Anything that can go wrong will go wrong." All of us have invoked Murphy’s law at some point in our lives, but who’s Murphy? The answer takes us to a U.S. Air Force base and a series of rocket tests during the late 1940s. After several mishaps, aerospace engineer Edward A. Murphy famously exclaimed: "If there are two or more ways to do something and one of those results in a catastrophe, then someone will do it that way." Murphy’s frustration was later summarized at a conference as "Anything that can go wrong will go wrong", and the rest is history.

8

Roger

Image: engin akyurt

Most people wouldn’t be surprised to learn that this phrase is of military origin, but not many would be able to explain how it came to mean ‘understood’. During WWII, the American and British forces used the Able-Baker alphabet for radio communications, where Roger (and not Romeo) represented the R. ‘Roger’ meant your message had been received and understood. While most militaries later shifted to the NATO alphabet, the use of roger as ‘understood’ stuck and was popularized by its use in the Apollo lunar missions.

9

Got your six

Image: Ocean Ng

While not as commonly used as other phrases of military origin, most people know that if someone tells them "I got your six," it means they have their back. The phrase stems from WWI aviators using the 12-hour clock face to describe directions: 12 o’clock was the front, 6 o’clock the back, and 3 and 9 o’clock the sides. As a blind spot, the back was a pilot’s most vulnerable area, so a wingman who ‘got their six’ was always appreciated.

10

Run amok

Image: Jordan Whitt

People telling a story about rambunctious children running amok would hardly imagine that this phrase has quite the violent origin. In Malay and Javanese cultures, amuk was used to describe warriors who launched frantic and violent attacks, often associated with a spiritual possession. The term was introduced into English by 16th-century European explorers, but it was Captain James Cook who popularized the phrase "run amok."


Tango, Bravo

Codewords decoded: How many did you know?


Published on June 25, 2026


Image: orso bianco

In situations where clear communication is paramount, especially when lives are at stake, professionals often rely on standardized codewords and phonetic alphabets designed to prevent confusion. Either from movies or from personal experience, it's probable that you've heard at least some of these before, and many have found their way into everyday conversation. Let's find out how many of these code expressions you can recognize.

1

Mayday

Image: Zhuravlev Andrey

Mayday is the international distress call used when the sender is in immediate, life-threatening danger. Pilots and mariners use it to signal that they require urgent assistance due to situations such as engine failure, fire, flooding, or medical emergencies.

The word was introduced in 1923 by British radio officer Frederick Stanley Mockford, who based it on the French phrase m'aider, meaning "help me," in an attempt to make it internationally recognizable. Hearing this transmission immediately alerts emergency responders that every second counts.

2

Pan-Pan

Image: DenisProduction.com

Not every emergency is severe enough to warrant a mayday call. When a crew faces a problem that is urgent but not immediately life-threatening, the appropriate codeword is Pan-Pan.

Like mayday, it comes from French: it derives from panne, meaning a breakdown or mechanical failure. A Pan-Pan call might be used if an aircraft loses an engine but can still fly safely, or if a ship experiences equipment problems while remaining under control. It tells responders that assistance is needed, but that the situation has not yet become critical.

3

SOS

Image: Grisha Bruev

Few emergency signals are as universally recognizable as SOS. Contrary to popular belief, the letters do not officially stand for "Save Our Ship" or "Save Our Souls." It was adopted in 1906 because SOS is an extremely simple, easy-to-transmit, and unmistakable pattern in Morse code.

SOS remains one of the world's most enduring distress signals, and it's still recognized by rescue organizations all around the globe.

4

NATO Alphabet

Image: Alexandros Michailidis

In the NATO phonetic alphabet, each letter is assigned a unique word to eliminate confusion when radio transmissions are distorted by noise or poor reception. If you've ever heard someone spell a name as "Mike Alpha Romeo Yankee," you've encountered the NATO phonetic alphabet.

The system was officially adopted by NATO in the 1950s and is now widely used by militaries, airlines, emergency responders, and many police departments worldwide. Using it greatly reduces the chance of misunderstanding important information over radio.

5

Roger

Image: nelikdulatov

Roger dates back to the early days of radio communication, when the letter R stood for "received." Before the adoption of the NATO alphabet, the US military used Roger instead of Romeo to represent that letter_._

Although modern communications systems have changed and the US military has fully embraced the use of the NATO alphabet, Roger remains standard aviation terminology, and it's one of the best-known radio acknowledgments in the world. It conveys a very simple but important meaning: "I have received and understood your message."

6

Wilco

Image: alleks19760526

Although many people assume Roger and Wilco mean the same thing, they actually convey different messages. Wilco is short for "will comply." In other words, it tells the sender not only that the message was received and understood, but that the instruction will be carried out.

Saying both Roger and Wilco is technically redundant in proper radio communication, since complying necessarily implies understanding, but the combination is often heard in movies and television.

7

Tango

Image: Quality Stock Arts

In the NATO phonetic alphabet, Tango simply represents the letter T. However, US military personnel have also adopted it as a shorthand when referring to a target or a hostile.

This secondary meaning became widely known through military operations in the twentieth century and has since appeared in countless books, films, and video games in phrases like "We've got one Tango moving north."

8

Oscar Mike

Image: Dragos Asaftei

Oscar Mike, NATO for the letters O and M, is military shorthand for "On the Move." It's a quick way of reporting that a unit has begun moving toward its objective.

The expression is especially common in the US military and has become more familiar to the general public through documentaries, memoirs, and films. It's finding its way into civilian life, meaning simply "I'm heading out."

9

10-4

Image: Elliott Cowand Jr

Ten-codes were developed during the 1930s to allow for brevity and standardization of message traffic in radio communications. They were widely adopted by US public safety departments and by radio enthusiasts.

While the system is being slowly phased out in favor of plain language communications, many local police, fire, and sheriff departments keep using it, and it is still strongly associated with radio culture by the general public. One of the most famous ten-codes is 10-4, meaning "received and understood."

10

Code Blue

Image: PeopleImages

Hospitals around the world use color-coded announcements to communicate emergencies without causing unnecessary panic among patients and visitors. Perhaps the best known is Code Blue, indicating that a patient is experiencing cardiac or respiratory arrest and requires immediate medical assistance.

While some hospitals use their own custom color codes, Code Blue has become so widely recognized that it now appears frequently in television dramas and everyday conversation whenever someone refers to a life-threatening medical emergency.

Looking for an extra scoop of literary fun?

Learn more with our Word of the day

feasible

/ˈfizəb(ə)l/