Green’s Dictionary of Slang

faking n.

also faiking
[fake v.1 ]

1. (UK Und.) thieving.

[UK]W.T. Moncrieff Heart of London II i: shut.: What the deuce brought you here? covey.: Oh, a little screen faking, that’s all.
[UK]‘Bon Gaultier’ ‘The Faker’s New Toast’ in Farmer Musa Pedestris (1896) 127: Come all you jolly covies, vot faking do admire.
[UK]G. Borrow Lavengro II 30: Do you think my own child would have been transported [...] if there had been any harm in faking?

2. (UK Und.) cheating (e. g. at a card game).

[US]Matsell Vocabulum 30: faiking Cutting out the wards of a key.
[UK]Leaves from Diary of Celebrated Burglar 111/2: Keeip thau ‘lyghts’ open, wilt thau? an’ iv thau ‘pypes’ any bloody ‘faikin’’ at wurk ‘sling’ mi t’ ‘office’.

3. (UK prison) counterfeiting illness.

[UK]M. Davitt Leaves from a Prison Diary I 145: Another and more frequent means of ‘fetching the farm’ is termed ‘faiking’ (malingering).

4. making, constructing.

[UK]P.H. Emerson Signor Lippo 91: My old man was a romany and got his dudder by chinay-faking and mush-faking.

In compounds

faking-boy (n.) (also faking kid)

(UK Und.) a thief.

[UK]‘Bon Gaultier’ ‘The Faking Boy to the Crap is Gone’ in Farmer Musa Pedestris (1896) 124: The faking boy to the crap is gone, / At the nubbing-cheat you’ll find him.
[UK] ‘Wakefield Gaol’ in R. Palmer Touch of the Times 250: My fakin’ kid, what brought you here?