Green’s Dictionary of Slang

a man, a fellow, a ‘bloke’.

1974		G.F. Newman You Flash Bastard 231: There’s this geez’ who’s been pulled, Terry. Eh, look, should I shoot over? I don’t want to talk about it on the phone.
2001		(con. 1964–8) J. Ellroy Cold Six Thousand 203: A geez pulls his air tube. He’s ninety-plus. He smokes a Camel.