The Two-Letter Joke From 1839 That the Entire World Still Can't Stop Saying

There is probably no expression more universally used in the English language — and possibly any language — than 'OK.' It ends text messages, seals agreements, and fills the awkward pauses in conversations across every continent. It's so embedded in daily communication that most people have never once stopped to wonder where it came from.

The answer, when you find it, feels almost impossible to believe. 'OK' started as a throwaway punchline in a Boston newspaper. It was never meant to last the week.

The Myth Pile

Before getting to the real story, it's worth clearing the ground a little — because 'OK' might be the single most mythologized piece of American slang in existence.

You've probably heard at least one of the competing origin stories. There's the claim that it comes from the Choctaw word okeh, meaning something like 'it is so.' There's the theory that it was stamped on barrels of rum from Aux Cayes, a port in Haiti. Some people swear it's derived from a Scottish expression, och aye. Others insist it comes from a Greek phrase, olla kalla, meaning 'all good.' And then there's the persistent folk legend that it was coined by President Andrew Jackson, who supposedly scrawled it on documents as an abbreviation for ole kurreck — his allegedly phonetic spelling of 'all correct.'

None of these are true. Linguists have traced them all back to dead ends. The actual origin was pinned down with real historical evidence by the scholar Allen Walker Read in the 1960s, and the story he uncovered is considerably weirder than any of the myths.

Boston's Very Strange Sense of Humor

In the late 1830s, a particular comedic trend swept through the newsrooms of Boston's newspapers. Editors and writers had developed a fad for deliberately misspelling common phrases and then abbreviating them — playing the joke in plain sight for readers who were in on it.

So 'all right' became oll wright, abbreviated to OW. 'All correct' became oll korrect, abbreviated to OK. 'No good' became know go, abbreviated to KG. It was the nineteenth-century equivalent of intentional internet misspellings — a winking, inside-joke kind of humor that assumed the reader would recognize the absurdity.

On March 23, 1839, the Boston Morning Post published what is now considered the first documented appearance of 'OK' in print. It was used casually, mid-sentence, as if readers would already get the joke — which, at the time, they probably did. It wasn't presented as a new coinage. It was dropped in like a familiar bit of slang that had already been circulating in conversation.

Most of the other abbreviations from this trend — OW, KG, GT (for 'gone to Texas,' meaning someone had skipped town) — faded out within a few years. 'OK' should have faded with them. It almost did.

The Election That Saved a Punchline

What rescued 'OK' from obscurity was, of all things, a presidential campaign.

In 1840, Martin Van Buren ran for reelection against William Henry Harrison. Van Buren was from Kinderhook, New York, and his supporters organized a political club called the Old Kinderhook Club — using his hometown as a rallying identity. They adopted 'OK' as their slogan, partly as a catchy abbreviation of Old Kinderhook, and partly because the expression had just enough circulation in Boston that it carried a vague sense of approval and correctness.

The campaign plastered 'OK' on banners, printed it in pamphlets, and got it into the kind of wide circulation that a newspaper joke never could have achieved on its own. Van Buren lost the election, but the expression survived it. By the time the campaign was over, 'OK' had broken out of its Boston origins and entered the broader American vocabulary — now detached from its original joke and carrying a general meaning of agreement, approval, or simple acknowledgment.

From there, it spread with American commerce, communication, and eventually the telegraph, which operators loved for its brevity. Two letters. One clear meaning. Perfect for a medium where every character cost something.

How a Local Joke Went Global

By the twentieth century, 'OK' had become a genuinely global word — one of the first American English expressions to achieve true worldwide reach. It traveled with Hollywood films, American military presence abroad, and eventually the internet, where its utility in digital communication made it more ubiquitous than ever.

Today, versions of 'OK' appear in languages that have otherwise borrowed almost nothing from English. It works because it does something rare in language: it's short, phonetically easy across many different sound systems, and carries a meaning that translates almost perfectly across cultures. Agreement. Acknowledgment. A signal that communication has landed.

What's striking about the whole story is how contingent it all was. If the Boston Morning Post hadn't run that joke on that particular morning. If Van Buren's supporters hadn't needed a two-letter slogan. If the telegraph hadn't rewarded brevity. Any one of those threads breaks, and 'OK' is just a forgotten bit of nineteenth-century newspaper humor.

Instead, it became the most-spoken expression on earth — proof that language doesn't evolve through grand design. Sometimes it just trips on a joke and keeps walking.