Originally published 2015-10-07.
The Murphy twins joke is a short pub story about two Irishmen in London who discover, one coincidence at a time, that they share a home city, a street, a school and a graduation year. The twist comes from the barman: the two "strangers" are twins who have had so much to drink that they no longer recognise each other. The full text is in the image below, and the rest of this page looks at why such a simple story still gets a laugh.
The story in brief
Two men sit side by side in Murphy's Pub in London. One overhears the other's accent and asks whether he is from Ireland. He is, and so is the man asking. From there the conversation narrows: both come from Dublin, both grew up on McCleary Street, both went to St Mary's, and both finished school in 1964. Each answer is greeted with louder delight, as though fate has brought two long-lost neighbours together.
Then a regular named Vicky arrives and orders a drink. Brian, the barman, shakes his head and tells her it will be a long night. When she asks why, he gives the explanation the reader has been missing all along: "The Murphy twins are drunk again."
How the joke is built
The structure is a ladder. Each rung is a question that should rule the second man out, and each time it does the opposite. Country, city, street, school, year: the list moves from the very likely to the almost impossible. A listener starts to suspect that something is off, which is exactly what keeps them listening.
The setting matters too. A pub is a place where people strike up conversations with strangers, so the opening feels normal. Putting the scene in London rather than Dublin makes a meeting of two Dubliners feel like a lucky chance rather than an everyday event, and that raises the stakes of every new coincidence.
Finally, the punchline is delivered by someone outside the conversation. The twins never learn the truth; only the barman and the audience do. That shift of viewpoint is what turns a string of coincidences into a joke.
Why the twist makes people laugh
Humour researchers often describe jokes like this one through the incongruity theory, the most widely cited of the major theories of humour. Philosophers such as Kant and Schopenhauer linked laughter to a sudden gap between what we expect and what turns out to be true. In the version known as incongruity-resolution, the listener first feels puzzled and then, in a flash, sees how all the pieces fit. The Murphy twins joke follows that pattern almost perfectly: the growing pile of coincidences is the puzzle, and the barman's line is the resolution.
A second idea, the benign violation theory proposed by Peter McGraw and Caleb Warren, says we laugh when something breaks our sense of how the world should work while still feeling harmless. Two adults failing to recognise their own brother is certainly a violation of the normal order. But nobody is hurt, the scene is cosy and the barman is more weary than worried, so the reaction is a laugh rather than alarm.
It also rewards a second look. Once you know the ending, the earlier excitement ("So did I!") reads differently, and the joke becomes funny again in a new way.
Irish jokes, stage Irish and stereotypes
The dialogue leans on a familiar comic voice. Words such as "begorra", a softened form of "by God", are listed in Wiktionary as a stereotypical example of colloquial Irish speech and are rarely heard in real conversation today. The joke also leans on the old image of the Irish drinker.
Ethnic humour has a long and mixed history. The historian L. Perry Curtis traced how the comic "Paddy" of Victorian England moved from a harmless simpleton to a much more hostile caricature. The sociologist Christie Davies, who studied ethnic jokes around the world, argued that such jokes are often funny for the same reason some people find them offensive: they play on stereotypes. Many Irish people happily tell jokes like this one about themselves, while others find the drunk-Irishman theme tired.
The kindest way to enjoy the Murphy twins is as two comic characters on a big night out, not as a statement about a whole nation. The joke works because of its shape, not because of anyone's nationality, and it would land just as well in almost any pub in the world.
How to tell it well
- Slow down on the coincidences. Let each new match land, and let the excitement in the two voices grow a little each time.
- Keep the details concrete. A street name, a school and a year make the story feel real and make the final reveal more satisfying.
- Introduce the barman quietly. If he appears too early, listeners guess the ending.
- Pause before the last line. A beat of silence after Vicky's question gives the audience a moment to wonder.
- Skip the heavy accent. An exaggerated brogue can tip the joke from affectionate into mocking, and it is not needed for the twist to work.
Where the joke comes from
No author is credited for this version. It has circulated online as a shared text image like the one above, with small changes to names, streets and years from one retelling to the next. That is typical of pub jokes, which pass from teller to teller and are polished along the way. Whoever first put the Murphy twins on their bar stools gave them a neat, self-contained story that still works when read aloud.
Sources: Wikipedia: Theories of humor; Wikipedia: Ethnic joke; Wiktionary: begorra. Joke text from a widely shared image; original author unknown.
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