Green’s Dictionary of Slang

1. (also f) a euph. for fuck v.; thus eff off, euph. for fuck off v. (1)

1938		T. Burns ‘Street Corner’ New Writing 73: ‘Bunch o’ toerags,’ said the tall girl....‘Ah, eff ’em,’ said Walter.
1957		G. Kersh Fowlers End (2001) 29: I’ll burn your effing show down to the effing ground; eff me if I don’t you old effer.
1961		J.A. Williams Night Song (1962) 183: Eff you, man.
1962		A. La Guma Walk in the Night (1968) 73: ‘Ah effit,’ Willieboy sneered. ‘You bare-arsed bastard. You got nothing.’.
1964		A. La Guma Threefold Cord 24: I’ll eff you up, pally.
1965		(con. WWII) E. Lambert Long White Night 16: Well, I’ll be effed!
1966		G. Fletcher Down Among the Meths Men 50: Eff them, eff the bleedin’ soddin’ lot.
1969		‘Iceberg Slim’ Mama Black Widow 110: Ah don want yu effing wif me agin.
1976		D. Ireland Glass Canoe (1982) 24: ‘Behave,’ he’d growl at some eager swearer, who was f’ing this and that in a loud voice.
1980		J. McClure Spike Island (1981) 204: He says, ‘Are you from the police?’ ‘Well done!’ I said — and they effed off.
1987		(con. 1920s) L. Redmond Emerald Square 42: Another Liberties character was Damn the Weather, who had been effing the Irish climate for years.
1991		L. Bing Do or Die (1992) 81: Eff yo’ set and eff yo’ dead homeboys.
1993		A. Bleasdale On the Ledge 29: What kind of communication is . . . is ‘f’ing’ this and ‘f’ing that – ‘f’ this and ‘f’ that?
1995		P. Boland Tales from a City Farmyard 164: He ‘effed’ my Dad from a height.
1998		Big Punisher ‘Capital Punishment’ 🎵 God ‘F’ the government and its fuckin capital punishment.
2002		J. Cameron Hell on Hoe Street 38: Piss on them all [...] Damn them, bloody them, blast them, eff them!
2002		A. Duff Jake’s Long Shadow 36: He can go eff himself.
2002		Observer 10 Mar. 12: I think it’s the way you talk to them that sometimes creates a problem. Don’t start effing off.
2004		Guardian G2 20 Feb. 6: He admits that it might be a bit of a challenge after effing it up for six years.
2008		in J. Miller Getting Played 51: When girls didn't respond to young men's advances, Antwoin said, ‘they be like, “F [fuck] you, B [bitch]”’.
2010		A. Steinberg Running the Books 244: I can not, and will not, be effed with.
2012		IOL News (S. Afr.) 5 Sept. 🌐 F him and his six wives.
2013		K. Koke ‘Fire in the Booth’ 🎵 She don’t f with punks cause they seem to avoid her / Shes thuggish she only f’s with thugs.
2016		A. Wheatle Crongton Knights 261: ‘If he lives he’s gonna wanted some effed-up revenge’.
2019		S.M. Jones Lives Laid Away [ebook] ‘I told him to go “F” himself’.
2019		A. Killilea Boyo-wulf at https://boyowulf.home.blog 13 May 🌐 Grendel has absolutely effed up the gaff, so now our poet takes some time to shit on the ways of the heathens.

2. to engage in homosexual intercourse.

1991

(ref. to 1910s) in Porter & Weeks Between the Acts 15: In my boyhood days [...] we used to call it shagging one another, though. And if it was plain speaking it was effing one another you see.