Wiktionary
n. 1 (context British Ireland colloquial English) A stereotypical standard dinner, with a meat and two kinds of vegetable. 2 (context British slang English) The male genitals.
Usage examples of "meat and two veg".
I don't want plates of meat and two veg carried from the kitchen by waiters who don't know a herring from a hot-cross bun.
You generally come up trumps if you can swing the lead in a Jackie Collins or a Julie Burchill, all baby oil, meat and two veg.
His accountant had polished her meat and two veg off in under fifty seconds, and had spent the rest of the meal staring at the plate, the cutlery, and from time to time at her fellow diners, in a manner that suggested that she was wondering what they'd taste like, which was in fact the case.
And the result is that the system churns out junior doctors who have paid bugger-all attention to the meat and two veg medicine they will find themselves up to their necks in from day one.