From Longman Dictionary of Contemporary Englishbrillbrill /brɪl/ adjective British English informal GOOD/EXCELLENTvery good It sounds really brill!
Examples from the Corpus
brill• I think Newsome, Fairclough and Kelly have been playing brill.• The C65 really does sound brill and even people that down Commodore reckon it sounds pretty nifty.Origin brill c20. From brilliant 