Green’s Dictionary of Slang

(orig. US) enough said, it is possible to infer all the facts from what has already been stated.

1837		A. Greene Glance at N.Y. II ii: Nuff ced – I’m there.
1842		Flash (N.Y.) 1:4 10 July 1/2–3: They both sat down upon the ground and raised the umbrella, so as to conceal themselves from the gaze of those who passed above, and then they — ah! — oh! — hem! — nuf ced.
1846		D. Corcoran Pickings from N.O. Picayune 49: ’Nuff sed.
1850		W.K. Northall Life and Recollections of Yankee Hill 38: ‘Captain, there be the jug.’ ‘Ah,’ said the Captain, ‘are that the jug?’ ‘It are,’ was the reply. ‘Nuff ced,’ exclaimed the Captain, ‘and now let us liquor.’.
1862		J.R. Lowell Biglow Papers 2nd series (1880) 112: ’Nuf sed, June’s bridesman, poet o’ the year.
1867		E.B. Christy Box And Cox in Darkey Drama 6 9: Nuff ced – gib us yer claw.
1875		M.D. Landon Eli Perkins 57: Nuf sed, young woman.
1882		Sydney Sl. Dict. (2 edn) 6: N.C., ‘Nuff Ced ‘ - Enough said. Thea[trical]. origin.
1886		N.Z. Observer and Free Lance (Auckland) 20 Mar. 23/4: What were the young men doing in the Billiard froom so late [...] Nuff sed. . .
1892		J.C. Duval Young Explorers 151: ‘Nuff ced,’ says Bill, ‘you jess take care of your own har, and I’ll see arter mine.’.
1895		Truth (Sydney) 5 May 4/7: ‘Nuff sed!’ replied the lady.
1900		Marvel 21 Dec. 15: Nuff sed.
1900		Sporting Times 17 Mar. 1/4: ’Nuff said—sling your hook.
1900		Sydney Sportsman (Surry Hills, NSW) 10 Oct. 1/1: Nuf ced for the present.
1908		K. McGaffey Sorrows of a Show Girl Ch. i: It was a college town and the show was on the blink. ’Nough said.
1913		J. London Valley of the Moon (1914) 63: ‘Nuff said,’ was Billy’s remark.
1914		Sport (Adelaide) 24 Apr. 3/3: They Say [...] That Fat L said he would be the best umpire in the ’Burg [...] Nuff sed.
1917		Mentor (Mass. State Prison) XVIII 361: Nuf ced. McDonald.
1918		I.A. Williams diary 12 May 🌐 In the evening we went to see ‘Goldman’s Ltd’ at the Theatre Royal. This is supposed to be the best show here. All I say is heaven help the worst. ‘Nuf sed.’.
1920		Four Jolly Jassers [concert programme notes] A real Creole Jazz band from the Land of Jazz, New Orleans — Nuff Sed.
1928		D. Lawley Hustling Hobo 186: That is all. Nuff said.
1946		Mezzrow & Wolfe Really the Blues 214: I know of one very bad thing that tea can do to you – it can put you in jail. ’Nuff said.
1952		J. Jones From Here to Eternity (1998) 265: ‘Nuff said,’ Stark said.
1967		J. Burke Till Death Us Do Part 122: All right. Nuff said.
2001		N. Barlay Hooky Gear 148: Nuff said, as they say, nuff said.