Leaving without letting anyone know.

See also: Joe Biden’s Afghanistanexit strategy”.
If we get bombed into oblivion by a pack of fundamentalist goat herders, you can thank Sleepy Joe and his Irish Goodbye out of Bagram!
by K9Mamma August 19, 2021
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When someone avoids emotional situations by cutting off all communication and contact with specific people and goes on with life like nothing ever happened.
Rather than be honest about the reasons behind her actions Iranga pulled an Irish Goodbye... again.
by Baron von Burlison II September 22, 2018
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1) getting so drunk at a party that one wanders off into the woods to wake up wondering "where's my underwear" and "this wolf lends new meaning to 'coyote ugly'" circa late 19th/early 20th centuries, usually derogatory reference to Irish ancestry and careless intoxication;

2) to do a thing without permission (especially to leave: as to leave a post, charge, elected/appointed office, husband/wife, or social position)
3) other versions:

3 a) the "French leave" circa 18th century English (citation: Merriam Webster: 1768-71) and references a party-goer exiting without properly taking "leave" of the host, often when wine has compromised coherency or motor function, or when disgraced by social or political position, behavior, or opinion;

3 b) filer à l'anglaise (FR) ("to leave English style")

3 c) άδεια από τη σημαία (Greek) ("leave on lowering of the flag (without discharge)") essentially to abandon one's post at nightfall
3 d) despedida a la francesa (Sp) ("goodbye in the French way", "French farewell")
3 e) most European languages reference "in the English way" with dates of common usage suggesting association with derogatory reflection on English civil wars, Welsh conflicts, Irish independence, and even a resurgence of usage with Brexit. Spanish and English reference French with derogatory connotation. English adds Irish, Scotch, Welsh, and Boer.
At the Superb Owl (superbowl mis-spelled) Party last night, John took an Irish Goodbye. We found him in the park. Tomorrow he starts rabies treatment.
by ninth1der February 4, 2022
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Leaving quietly out the side door of a party or bar without saying goodbye to anyone. Mostly due to the fact that family or friends would most likely take your keys away for being to intoxicated.
next morning:

Irish goodbye O'leary? You should not have been driving!
by Scott F from Beantown April 15, 2008
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leaving the bar or anywhere for that matter, without closing niceties, like a kiss goodbye to that annoying girl or mentioning something to your friends
Where'd Cornelius go?
He must have pulled another Irish goodbye, that bastard.
by Mangorooni March 29, 2006
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When two leprichauns slap their cocks together on departing
Seamus and kev had a 'sword fight' jk it was just an Irish goodbye
by Sumborino March 27, 2017
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Abandoning your friends at a party/bar/dinner without saying a single word to any of them, usually resulting from being very intoxicated. California Irish Goodbye's are risky for the DUI exposure. Also deserting your buds 10-20 miles away from their residence deserves an ass kicking.
Where's John at, I haven't seen him for over an hour.

I dunno, someone mentioned he did a sneaky California Irish goodbye a while ago.
by Holly Reporting from Compton September 29, 2009
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