Green’s Dictionary of Slang

(Irish) a crazy person; also adj.

1997		C. McPherson Weir 44: Yous all think I’m a loolah now.
2001		C. McPherson Port Authority 5: All the young loolas coming into the pub.
2019		A. Killilea Boyo-wulf at https://boyowulf.home.blog 14 Apr. 🌐 And from him came about all sorts of gurriers; gombeens and loolas and absolute gowls.
2021		L. McInerney Rules of Revelation 57: [S]he’s seriously impulsive. Actually, she’s pretty loo-lah.