VAT noun vodka and tonic UK Initialism, punning on value added tax; made popular by 1980s television series Minder.
[C]onsoling myself with a catering-size vodka and slimline (hereafter referred to as VAT) down the Winchester[.] — Andrew Nickolds, Backto Basics, 1994
I buy a pint and get Mel a VAT. — Danny King, TheBurglarDiaries, p. 51, 2001