Irish Flu

A particularly unpleasant hangover.

"Last night was great, but I have the worst case of the irish flu today."

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Irish Flu

An unpleasant hangover (From the movie "The Shallows"

" ...and now she's just stuck back at Las Rocas with the Irish flu"

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Irish Flu

The ailment one suffers on March 18th after properlyly celebrating St. Patrick's Day. Anyone of Irish descent may also use the term to denote a hangover on any day of the year.

Seamus: Ugh, I was out drinking Guinness until the wee hours. I think I'll call in with the Irish Flu today.

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Irish flu

A hangover, usually involving whiskey; may be mild or severe

"I’ve still got a touch of the Irish flu."

"The Irish flu?"

"Also known as a hangover."

(from "A Nose for Murder" by Lee Charles Kelley

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