Green’s Dictionary of Slang

1. an act of sexual intercourse.

1971		(con. WWII) B. Aldiss Soldier Erect 124: Where are the birds? We want three as are fit enough to stand a gude shafting.
1981		W. Boyd ‘Hardly Ever’ in On the Yankee Station (1982) 38: ‘Wor! Think of it waiting [...] The shafting, Nilo my man,’ he said intensely. ‘The royal bloody shafting we’re going to do.’.
2001		P. Meditzy ‘A Day In The Life Of...’ 29 Apr. 🌐 I must have ‘given her a right good shafting’ as well because when she got up to visit the loo she was ‘walking like John Wayne’.

2. unfair treatment.

1967

E. Shepard Doom Pussy 22: Some newsmen have been giving the Marines a real shafting.

3. a stabbing.

2002

J. Cameron Hell on Hoe Street 24: Give a shafting with a sticker, give a whacking with a rice flail.