Green’s Dictionary of Slang

1. a mixture of drinks assembled from the dregs of bottles and glasses.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: All nations. A composition of all the different spirits sold in a dram-shop, collected in a vessel into which the drainings of the bottles and quartern pots are emptied.
1793		J. Caulfield Blackguardiana.
1811		Lex. Balatronicum.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
1846		Swell’s Night Guide 109/1: All Nations, the drainings of different spirits or beer mixed together.
1866		Sportsman 30 Aug. 2/1: Notes on News [...] Of what potent ingredients ‘All Nations’ is compounded know not. Probably it is not unlike mixture we ourselves once tasted [...] called ‘Landlord’s Own Punch,’ which [...] ‘made a man wink his eyes fit to knock an omnibus over’.

2. a coat of many colours or covered in patches.

1889–90		Barrère & Leland Dict. of Sl., Jargon and Cant.
1890–1904		Farmer & Henley Sl. and Its Analogues.