Green’s Dictionary of Slang

(UK Und.) fixed dice that will always show high numbers.

1663		J. Wilson Cheats IV i: [I] taught you the use of up-hills, down-hills, and petars* (*Note. Terms applicable to false or loaded dice, or to the knavish mode of handling them).
c.1698		B.E. Dict. Canting Crew n.p.: Uphils [sic] high Dice.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1801		‘Modern Dict.’ in Sporting Mag. May XVIII.
1811		Lex. Balatronicum.
1824		History of Gaming Houses & Gamesters 41: He taught the art of doing the flats, cutting the broads right, and throwing uphills.
1859		Matsell Vocabulum.
1895		Crowe Aus. Sl. Dict. 91: Upp Hills [sic], false dice.