Irish Stereotypes
I would say the most common is that Irish are drinkers. This stereotype has actually been somewhat substantiated by my two Irish friends (who recently moved to the UK) who could
absolutely drink me under the table...but then, I'm just a lightweight chick and they've also got a decade of experience on me...
Other common associations are that all Irish people love St. Patrick's Day....that they believe in Leprecauns and pots of gold and four-leaf clovers....probably because of the American "Lucky Charms" commercials.
There is the conception that all Irish people hate Scottish people. I don't know if that's true or not, but I don't like any all-encompassing assumptions. I am an American mutt myself--English, Irish, Scottish, Danish, Polish, French, and German (yes, I'm very white)--and sometimes I will joke that my Scottish and Irish blood mean that, theoretically, I should be kicking my own a**. Maybe that's why I'm indecisive?
I've also heard that some Americans think Irish men aren't considered that attractive? I'm not sure the best way to say that... but there is the saying "As ugly as a red-headed step-child"...Personally, I haven't found that to be true, but I have heard some women say that Irishmen with black hair and blue eyes are attractive (tall, dark, and handsome) but men with red hair and freckles are "homely". And, I hope I'm not getting too raunchy here, but I've heard some girlfriends make comments about Irish men being well-endowed. I wouldn't know myself.
My brother-in-law is 100% Irish, so all four of my little nieces are georgeous red-heads. They have beautiful white skin without a freckle....often times people will come up to them and comment on their skin, as if they
expect them to have a face full of freckles. People also seem to assume that they will burn easily...but they don't actually.
Others have mentioned in this thread the "brawler" stereotype. I've heard this, too. Redheads and Irish people are stereotyped by some as hot-tempered, quick-tempered...
I can't think of anything else at the moment. Hope this is along the lines of what you were looking for....