"A few scoops"
"Sure just the one."
"There's no harm in it."
"A bird never flew on one wing."
"The best pint is the one you didn't plan."
"Put a hole in it." Finish your drink, we're going to the next place.
"It has to be done."
"Going for a cure" of a hangover, that is.
"Sure wasn't it the good Lord's first miracle turning water into wine." overheard, on the town (spoken by an elderly lady.)
Tá mé ar meisce "I am drunk," in Gaelic Irish.
"Didn't know me name."
Dyin' (used when 'phoning employer the next day.)
In a heap
In the horrors (may also describe a hangover.)
In the holy horrors (worse than the horrors.)
In the rats
(Have a) jar
Mashed (possibly especially Corkonian.)
Off me head
On the drink
On the batter
On the beer
On the razz