Biblical neckline
⇨ Biblical neckline; Biblical top
noun a low-cut neckline on an item of ladies' wear that reveals generous amounts of cleavage, or more. A pun on 'Lo and behold!'. Possibly Australian in origin and, when noted in 1984, was thought to have slipped into disuse by the mid-1960s. It is currently alive and well in the UK in comedian's patter: 'I see you're wearing your biblical top tonight ... Lo and behold! And, yea, I can see the promised land. And, hallelujah! – there is milk and honey! One on each tap'
UK, 1984