Ties in with the stereotype that Irish men are not very articulate or compassionate. If something was particularly unpleasant or an anti-climatic it might be "like loosing your virginity to an Irishman". Another way it can be said with similar meaning is "like having sex with an Irishman".
Person1: How was your first shift at work?
Person2: It was like loosing my virginity to an Irishman.
Can be used in a stern way to cut conversation off as it is something you do not wish to talk about.
An adaptation of the Dirty Sanchez, the Dirty Irishamn is a sexual act which is implemented while engaging in anal sex due to the female's monthlies. While in the doggy style sexual position with the male's penis entering the female's anus, the male shoves his entire hand into the menstruating vagina of the female in order to extract copius amounts of menstrual fluid. He then smears the menstrual fluid all about her face and chin, giving the female the appearance of having a red beard, like that of a Mick.
My girlfriend didn't didn't speak to me for a week after I gave her a Dirty Sanchez, so I surprised her on her birthday with a Dirty Irishman. She was so proud, she wore that beard for a week and showed it off to all her friends, making them all green with envy.
a huge cocky asshole who thinks hes the shit just because he has delicious abdominals. ncs girls fan over him, especially lame sober ones who resemble rats and have gross hair.