Green’s Dictionary of Slang

(Irish) idiotic, stupid.

1895		E. Townsend Chimmie Fadden Explains 36: De whole game was give to Miss Fannie by a ijet dude what heard it at de club.
1903		Shiner Gaz. (TX) 25 Feb. 9/2: ‘You bliddering eejit,’ said Jeremy.
1950		S. Murphy Stone Mad (1966) 97: I can always remember the eejity things I did.
1986		(con. 1930s) P. O’Farrell Tell me, Sean O’Farrell 78: The Clane man got maggoty, mouldy, eejity and struck the earl with the red cap.
1999		Indep. Rev. 3 Nov. 8: Oh sure, he said, it’s OK for eejit 10-year-olds.
2021		L. McInerney Rules of Revelation 62: I went in along with the idea of being an eejity foreigner, taking a bunch of selfies and laughing at myself.