Green’s Dictionary of Slang

(mainly Irish) a euph. for fuck! excl.

1981		(con. c.1920) P. Crosbie Your Dinner’s Poured Out! 51: Another chant of ours as youngsters was a list of so-called curse-words [...] ‘Feck, damn, blazes, cocky, piss and snots’.
1982		(con. 1930s–50s) E. Mac Thomáis Janey Mack, Me Shirt is Black 153: ‘Ah, feck it,’ said my pal.
1987		(con. 1920s) L. Redmond Emerald Square 60: ‘Feck you, y’oul get,’ I shouted.
1991		F. Mac Anna Last of the High Kings 10: Words like Feckit, just the way Da said it.
1991		B. Quinn Smokey Hollow 9: Oh feck, he should have closed his eyes for that bit.
2002		Indep. Rev. 23 Mar. 2: ‘Feck’ is a long-established Irish swearword that tends to be used in situations where the ‘real’ F-word would be excessive.