Green’s Dictionary of Slang

up to adv.

also up
[20C+ use is SE]

1. aware of, knowledgeable about.

[UK]G. Parker View of Society II 80: This trick had been once attempted upon a landlord who was a man of the world, and up to their gossip.
[UK]G. Parker Life’s Painter 136: I was wipe-priging, we made a regular stall for a tick and reader, but the cull was up to us, and we couldn’t do him.
[US]Merry Fellow’s Companion 28: ‘I was down upon him [...] I was up, you see, to all he knew’.
[UK]Sporting Mag. Oct. V 79: Make him fly! Get him up.
[UK]M. & R. Lovell Edgeworth Essays on Irish Bulls 138: O, my lord, I knew him. I was up to him.
[UK]Egan Boxiana I 4: They are not down to the ‘Sublime and Beautiful’ or up to the ‘Diversions of Purley.’.
[UK]‘An Amateur’ Real Life in London I 63: No man was better up to the rigs of the town; no one better down to the manoeuvres of the flats, and sharps.
N.Y. Statesman 21 June 2/4: The mayor asked witness if Ann took out with her when walking the bootle (slang word for a bundle of forged notes.) Here A. C. [Ann Carter, defendant] laughed and said to the mayor, ‘I see your honor is up to the slang.’.
[UK]Duncombe Dens of London 37: Jamie [...] had an eye as sleepy and cunning as a cat; and, to use his low jargon, was ‘up to summat,’ and knew ‘what was what.’.
[Ire]Wexford Indep. 30 Nov. 4/1: We’ll just show Sir Robert we’re up to his rigs.
[UK]Era (London) 15 Mar. 12/1: He was up, down, and fly, cunning as a Jew, sharp as a razor and quick as an antelope’.
[UK]R.F. Walond Paddiana I 96: I’ll be up to ould Lanty, as cute as ye are.
[Aus]Bell’s Life in Sydney 26 Aug. 1/2: [N]ot being what the young scapegrace Rugbinian would call ‘down,’ or rather, ‘up’ to his slang.
[UK]A. Smith Natural History of the Gent 8: He imagined that by addressing his coarse, annoying gallantry to an unprotected girl he was [...] ‘a fast man,’ ‘up to a thing or two’.
[UK]Kendal Mercury 17 Apr. 6/1: He vill find his kids vide avake and up to dodges of that sort.
[Aus]Bell’s Life in Sydney 8 Dec. 3/1: A non wide-awake personage named John Murphy who was evidently not well up to ‘the time o’ day’ in Sydney, .
[UK] in Punch ‘Dear Bill, This Stone-Jug’ 31 Jan. n.p.: But the lark’s when a goney up with us they shut / As ain’t up to our lurks, our flash patter, and smut.
Inquirer (Perth, WA) 28 Nov. 3/6: Nowise shy or timorous, / Up to all that men discuss. / Never mind how scandalous. / Fast young ladies.
[UK]T. Hughes Tom Brown at Oxford (1880) 58: A cunning old beggar, the père de famille of the encampment; up to every move on the board.
[UK]Five Years’ Penal Servitude 167: Just try to come the hanky-panky and play the old soldier with him and there was no man in Dartmoor Prison more up to every move than the old Marine.
[US]J. Harrison ‘Negro English’ in Anglia VII 265: To be up ter = to be cunniug enough for.
[UK] ‘’Arry on Song and Sentiment’ in Punch 14 Nov. 229/1: The mugs who write poetry rot [...] they simply ain’t up to wot’s wot.
[Aus]H. Lawson ‘Two Sundowners’ in Roderick (1972) 102: He began to suspect that brummy was up to his little game.
[Aus]H. Lawson ‘Joe Wilson’s Courtship’ in Roderick (1972) 540: I’m up to all these dodges.
[UK]D. Stewart Shadows of the Night in Illus. Police News 10 Aug. 12/4: ‘I’m fly and up ter every move on the board’.

2. opposed to.

[Ire]Freeman’s Jrnl (Dublin) 6 July 4/1: Before the murder she told me the master was very cross to her and she would be ‘up to him;’ she said she would get her brothers to murder him.