Green’s Dictionary of Slang

Veronica Lake n.

[rhy. sl.; ult. the film star Veronica Lake (1919–73)]

a steak.

[Aus]J. Alard He who Shoots Last 74: ‘Tell da bait layer dat he wants da biggest Veronica Lakes wot he’s got,’ ordered the Wrecker.
[UK]R. Puxley Cockney Rabbit.