Green’s Dictionary of Slang

a gin and tonic.

1977		C. McFadden Serial 50: He paid for his g & t.
1983		J. Byrell (con. 1959) Up the Cross 15: ‘I’ll have a G and T if you don’t mind’.
1987		Eble Campus Sl. Fall.
1989		T. Blacker Fixx 146: Pint of best and a large g and t.
1993		D. Jarman diary 23 Jan. Smiling in Slow Motion (2000) 299: The boys were drinking G and Ts.
1996		P. Temple Bad Debts (2012) [ebook] I haven’t even offered you a drinky. I generally have a G and T around this time.
2001		Observer Mag. 11 Mar. 14: Ohmigod, he is – sitting at the bar with four or five G&Ts in front of him.
2009		P. Temple Truth 195: Then it’s back to the captain’s cabin for a fucking G and T.
2013		P. Abbott ‘The Higher the Heels’ in ThugLit Nov.-Dec. [ebook] [T]he bartender delivered a second G & T.
2017		M. Forsyth Short History of Drunkenness 13: [A] little G&T stimulates the digestive system.
2024		J. Meades Empty Wigs (t/s) 461: ‘Bumper gee and tee ice and slice twice’.