Green’s Dictionary of Slang

1. good.

1856		H. Mayhew Great World of London I 6: ‘Bone,’ which is slang for good.
1859		Salisbury & Winchester Jrnl 15 Oct. 7/4: Beggars’ Marks [...] Bone (good). Safe for a ‘cold tatur’.
1859, 1860		Hotten Dict. of Modern Sl. etc.
1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor I 364/1: A mark being placed on the door post of such as are ‘bone’ or ‘gammy’.
1870		Hotten Sl. Dict.
1881		Dundee Courier (Scot.) 8 Mar. 7/4: A diamond [i.e. a tramp sign] meant, ‘Bone (good) for a cold tater if nothing else’.
1884		Dundee Courier 13 June 7/5: There’s a good old parson in this village [...] said to be bone for a bob.

2. (US Und.) complete, absolute.

1970

‘Red’ Rudensky Gonif 50: I got the bone works when it came to security. They stayed on me like hawks.