subs. (colloquial).Sleep before midnight: on the assumption that early hours conduce to health and beauty.
1850. F. E. SMEDLEY, Frank Fairlegh, II., 120. The fair pupils have talked themselves to sleep not until they have forfeited all chance of getting a little BEAUTY-SLEEP before twelve oclock.
1857. C. KINGSLEY, Two Years Ago, xv. Are you going? it is not late; not ten oclock yet. A medical man, who may be called up at any moment, must make sure of his BEAUTY-SLEEP.
1869. BLACKMORE, Lorna Doone, lxiv. Would I please to remember that I had roused him up at night, and the quality always made a point of paying four times over for a mans loss of his BEAUTY-SLEEP. I replied that his loss of BEAUTY-SLEEP was rather improving to a man of so high a complexion.
1880. PAYN, A Confidential Agent, iii. You must get your BEAUTY-SLEEP, cried he to his wife when Barlow had departed, or you will have no colour in your cheeks to-morrow.
1901. Pall Mall Gazette, 15 May, 3. 1. In point of fact, Hebe is too valuable not to be allowed her BEAUTY-SLEEP.