Whether it’s true or not, Irish are believed to be drinking to excess, so it doesn’t come as a surprise that there are a bunch of jokes about them regarding the consumption of liquor. However, we believe the one below is one of the best out there.
This is gonna make you burst out laughing 
Two men were sitting next to each other at Murphys Pub in London. After awhile, one bloke looks at the other and says, “I can’t help but think, from listening to you, that you’re from Ireland.”
The other bloke responds proudly, “Yes, that I am!”
The first one says, “So am I! And where about from Ireland might you be?”
The other bloke answers, “Im from Dublin, I am.”
The first one responds, “So am I!”
“Mother Mary and begora. And what street did you live on in Dublin?”
The other bloke says, “A lovely little area it was. I lived on McCleary Street in the old central part of town.”
The first one says, “Faith and it’s a small world. So did I! So did I! And to what school would you have been going?”
The other bloke answers, “Well now, I went to St. Marys, of course.”
The first one gets really excited and says, “And so did I. Tell me, what year did you graduate?”
The other bloke answers, “Well, now, lets see. I graduated in 1964.”
The first one exclaims, “The Good Lord must be smiling down upon us! I can hardly believe our good luck at winding up in the same place tonight. Can you believe it, I graduated from St. Marys in 1964 my own self!”
About this time, Vicky walks up to the bar, sits down and orders a drink.
Brian, the barman, walks over to Vicky, shaking his head and mutters, “I’ts going to be a long night tonight.”
Vicky asks, “Why do you say that, Brian?”
“The Murphy twins are drunk again.”