It's more of a Scottish slang word but the Irish do use it sometimes.
It's not Irish; it's Scottish slang.
bróga reatha
lush is a slang word for alcohol, and lushing means drinking.
It is a slang word in Ireland for a party, usually with traditional Irish music and dancing.
In Ireland it's: acting the prick / thran
The typically UK slang is gobsmacked (shocked or dumbfounded), from the 1960s era military slang, itself from the Irish word "gob" for mouth.
Kicks, sneakers, or trainers.
Slang for sneakers is "kicks."
Cracker is a slang word for a white person. This idiom has its origins in slavery- white people were called "crackers" because of the sound of a slave-owner's whip.
Fella, lad, chap, gason.
Mate or Mucker, mate is mainly used around Dublin (the capital of Ireland)