The fear
The dread that descends after a night's drinking: shame, anxiety, half-recalled embarrassments, and the certainty that everyone present saw or heard whatever you cannot quite remember saying. Always with the definite article - you have 'the fear', not just 'fear'. Most common in younger Irish slang since the early 2000s.
Etymology
A modern Irish slang coinage, attested from the early 2000s and spread globally since by Irish twentysomethings online and abroad. The construction 'the' + abstract noun ('the fear', 'the horrors', 'the ick') is a Hiberno-English idiom pattern and almost certainly shaped the form. Not a direct calque from Irish, but the syntactic shape is Irish-inflected: standard English would more naturally say 'I have a fear' or simply 'I'm anxious'.
In a sentence
Anyone else have the fear? What did I say to your man with the beard? - a Sunday-morning question
Lashing it on Saturday, the fear on Sunday, fine again by Tuesday. - a weekend arc
Historical notes
The fear is one of the small number of Irish-English coinages that has properly gone transnational in the last twenty years, helped by exported Irish writers, comedians, and internet culture. The defining feature is the social-anxiety component: a hangover is physical, the fear is what your brain does to itself in the hours afterwards. The phrase now appears in non-Irish writing about hangovers without explanation, which is a good marker of when an idiom has stopped being regional and started being naturalised English.
Sources
- Oxford English Dictionary, 2024 Irish English additions. · dictionary
- Joe.ie and Irish Times features on Irish hangover vocabulary (recurring twenty-first-century usage). · other