Green’s Dictionary of Slang

god-damn it! excl.

also goddam(m)it!

a general excl. of exasperation.

[Ire]Dublin Eve. Packet 24 Nov. 3/3: God damn it [...] that tour [...] was chiefly the cause of this cursed event.
[UK]Marryat Mr Midshipman Easy II 305: ‘I hope I have not sworn — I hope not.’ ‘Not a word,’ said Jack – ‘I was close to you all the time — you only said, “God preserve us!”’ ‘Only that? I was afraid that I said “God d--n it!”’.
[UK]W. Kent Guardian 6 Jan. 6/3: Brien started up and said, ‘God damn it, where is your money’.
[UK]Derry Jrnl 25 Mar. 2/6: God damn it, Sir, it’s all stuff and nonsense.
[US]Nat. Trib. (Wash., DC) 6 Sept. 3/6: Goddammit No!
[US]Watchman & Southron (Sumter, SC) 31 Aug. 3/3: Mr Folk said, God damn it, come in the road.
[UK]E. Pound letter 7 June in Read Letters to James Joyce (1968) 143: Gawd damn it, it is Writing, with a large W. and no C.
[US]D. Parker ‘Big Blonde’ Penguin Dorothy Parker (1982) 195: God damn it, I’m through, I’m telling you.
[UK]Falkirk Herald 31 Dec. 7/2: As soon as he opens his mouth to say ‘Goddammit’.
[US]H. Miller Tropic of Capricorn (1964) 250: God-damn it, Henry, you’re the only real friend I’ve got.
[Aus]K. Tennant Foveaux 84: ‘God damn it,’ he would roar. ‘You’ve got nothing to do but sit round all day and dress yourselves. Why isn’t dinner ready?’.
[UK]G. Kersh They Die with Their Boots Clean 45: God damn it, any soldier’d be shamed to stand in a rank like a dog’s leg!
[US]N. Mailer Naked and Dead 144: Goddammit [...] can’t you guys keep quiet?
[US]E. De Roo Go, Man, Go! 13: God-dammit-to-hell!
[US]H. Selby Jr Last Exit to Brooklyn (1966) 199: This heres for usall to use an ghuddamit Im gonna use this mothafucka if ah gotta break yo fuckin haid.
[US]E. Tidyman Shaft 76: Go, goddamnit!
[UK]P. Theroux Picture Palace 31: Goddamit, yes!
[US]G.V. Higgins Patriot Game (1985) 80: Goddammit, it’s a rare day you don’t find out something new in this great land of ours.
[UK]M. Amis London Fields 136: I have never screwed around (why not, God damn it?).
[US]D. Hecht Skull Session 270: Eddy, goddamn it, come on!
[US]C. Cook Robbers (2001) 5: Eddie said, Goddammit to hell.