Irish men will often greet with a sideways nod when passing on the street. This is usually accompanied by an audible gesture, whether a click of the tongue or a verbal greeting.
This is a de facto Irish-English word, an affirmative exclamation. It consists of a rapid inhalation, and sounds a bit like a gasp. Sometimes it is pronounced a bit like "yeah;" but not always. Most common amongst women.
Use of one's given name
If an Irish person knows your first name, he or she will probably call you that, even without introduction.
Small-talk in Ireland is an important part of most normal interactions....
Eyes to heaven
An uptoss of the chin accompanied by a slight click from the tip of the tongue and a "you know y'rself" rolling of the eyes upward.... This expresses acknowledgement of the sublime and ridiculous nature of reality.
The Irish have difficulty making a formal complaint....
"Yeah but sure "what can you do?..."