gin and Jag, adj. — Green’s Dictionary of Slang

gin and Jag adj.

also gin and Jaguar

[the preoccupations of the inhabitants; Jag n.]

pertaining to any wealthy area near a metropolitan city, e.g., the wealthy Home Counties around London.

1969		Sun. Tel. 16 Mar. 3/3: (headline) The ‘gin and Jag’ rebels [OED].
1978		Solicitors’ Jrnl 122 742: Decent personal old pubs given the ‘Gin and Jag’, plastic-fantastic treatment.
1986		Hospitality 75-94 vii: I do get fed up with the rather unprofessional gin-and-Jag image which public relations still has.
1999		Indep. Rev. 4 Aug. 5: Des’s taking his diamond-patterned jumpers and Gin-and-Jag pre-match sex appeal off to ITV is the coup de grace.
2004		D. Hemmings Blow Up... and Other Exaggerations 27: I collected Linda and drove her to the Swan at Thames Ditton — a handsome, if somewhat flashy gin-and-Jag establishment.

In compounds

gin and Jag belt (n.) (also gin and Jaguar belt)

a wealthy area near a metropolitan city; usu. Home Counties surrounding London, and, as such, considered ripe for robbery.

1969		Sun. Tel. 16 Mar. 3/3: The working-class boy is a dedicated and motivated student. It is students from the gin-and-Jaguar belt who often lack any sense of what a university is for [OED].
1977		D. Powis Signs of Crime 185: Gin and Jaguar belt The upper class districts of Surrey, and a fruitful area for worth-while housebreaking.
1999		N. Cohen Cruel Britannia 23: Discerning Mancunians once looked down their noses at Neil Hamilton’s constituents in the north Cheshire gin-and-Jag belt.

gin and Jag bird (n.) (also gin and Jaguar bird)

a louche, raffish woman from this area, presumed, while prob. married, not to be averse to something ‘on the side’.

1977

D. Powis Signs of Crime 185: Gin and Jaguar bird A wealthy (usually married) woman from this area and in some senses likely to be ‘racy’, ‘with it’ or sexually accommodating.