Green’s Dictionary of Slang

uncouth, working-class.

1894		A. Morrison Tales of Mean Streets (1983) 133: An’ you’re a bleed’n’ gawblimy slackbaked ...
1915		Honk! 28 Jan. 2/2: One gor blime Lieutenant tried to throw our bosses boomerang away but the bloomin thing came back.
1958		Oxford Mag. 27 Feb. 326/1: The British and American tendency is to emphasise the Gorblimey aspect of history, the feelings of the ordinary man on the spot at the time [OED].
1962		Listener 31 May 967/1: She offered a gorblimey cheerfulness .
1975		‘P.B. Yuill’ Hazell and the Three-card Trick (1977) 112: Self-taught pricks who’d left their council houses and gorblimey dads so far behind you couldn’t see ’em with spy-glasses.
1999		Guardian G2 21 June 12: Turner was a bit of a gorblimey Londoner, with neither the appearance nor the manners of a gentleman.
2000		N. Barlay Crumple Zone 200: Gor blimey Soaps, Soapy me old china, would you adam ’n’ eve it . . . just as I was about to sort you.