Green’s Dictionary of Slang

wonderful, excellent.

1979		Melody Maker 19 May n.p.: Again are definitely on to something pretty brill [KH].
1983		J. Sullivan ‘Thicker than Water’ Only Fools and Horses [TV script] rodney: What’s wrong? del: Nothing, honest! Everything’s brill!
1992		M. Frayn Now You Know 232: I’m having a brill time.
1996		Dandy Book n.p.: ‘I got this brilly new game but it’s got no batteries’.
1997		A. Roberts Rasherhouse 151: Jasus, that’s brillo, Betty. Ya sure but?
2006		D. Mitchell Black Swan Green 44: Life must be pretty brill for Julia.