Green’s Dictionary of Slang

(US) a euph. for damn adj./damned adj.; thus as n. in one’s blamedest, one’s utmost.

1833		Knickerbocker Mag. May 303: I thought I mought reach it with greater safety by dressing myself up in disguise, which I now look upon as a blamed foolish notion.
1840		T. Haliburton Clockmaker III 84: Yes, John Bull is a blamed blockhead.
1847		Somerset Herald 13 July 1/1: For spite, she done as she blambed please.
1862		J.R. Lowell Biglow Papers 2nd series (1880) 11: When I writ last, I’d ben turned loose by thet blamed nigger, Pomp.
1873		W.H. Thomes Slaver’s Adventures 35: ‘Ah,’ muttered Cringy, with a sigh of relief, ‘de blame rascal no teal sheeps more. Me berry glad dat he be killed. He great humbug.’.
1875		M. Thompson Hoosier Mosaics 57: Take the blamed ole shackemerack an’ all the cussed blue-birds an’ peerweers to boot, for all I keer!
1885		Bulletin (Sydney) 14 Mar. 14/4: Jumpin’ Moses! what are you laughing at! Every nubble of my back-one’s skinned! That minx, Mary, left a piece of soap on the top of the stairs, and I trod on it. I clutched at the banisters and grabbed this blamed bucket!
1887		H. Frederic Seth’s Brother’s Wife 339: He’s th’ blamedest fool in th’ county.
1887		Ouachita Teleg. (Monroe, LA) 15 Jan. 4/1: Confound this country! The darn niggers won’t work [...] the blame niggers won’t work.
1889		J.K. Jerome Three Men in a Boat 24: The third man [...] wants to know what the thundering blazes you’re playing at, and why the blarmed tent isn’t up yet.
1889		Kipling ‘The Bow Flume Cable-Car’ in Civil & Military Gaz. 10 Sept.(1909) 189: ‘He put all our dollars into that blamed barroom.
1894		H. Lawson ‘His Country — After All’ in Roderick (1972) 201: What the blazes do I want to have a look at the blamed country for?
1901		B. Pain De Omnibus 128: I says as a man who drops a penny inter a glawss o’ bitter is a blimed fool.
1902		J. Conrad Heart of Darkness 39: I left in a French steamer, and she called in every blamed port they have out there.
1903		F. Benton Cowboy Life on The Sidetrack 197: Your heart is the blamedest thing.
1906		D. Stewart Vultures of the City in Illus. Police News 8 Dec. 12/1: ‘[T]he old gent below would melt it [i.e. silver plate] in his pot a blarmed sight quicker than we shall in ourn’.
1907		Lone Hand (Sydney) June 154/2: ‘None o’ yer blamed new-fangled names fut me’.
1910		F.P. Dunne Mr Dooley Says 91: Th’ Philipeens, which ar-re a blamed nuisance.
1911		G. Stratton-Porter Harvester 8: You blame degenerate pup, you!
1914		Ade ‘New Fable of the Lonesome Camp’ Ade’s Fables 274: Every time he came up Dearie would do her blamedest to Bean him and put him out of the Game.
1915		C.J. Dennis ‘A Spring Song’ Songs of a Sentimental Bloke 13: This blimed ole Springtime craze / Fair outs me, on these dilly silly days.
1921		Dos Passos Three Soldiers 61: ‘If you fellers don’t quit yellin’, I’ll put the whole blame lot of you on K. P.’ came the sergeant’s good-natured voice.
1924		Townsville Daily Bulletin (Qld) 22 Nov. 4s/1: I am a blarmed fool to have you working here.
1929		R. Bradford This Side of Jordan 163: She de blamedest gal I ever see.
1935		Z.N. Hurston Mules and Men (1995) 41: Ah wish Ah was God. Ah’d turn you into a blamed hawg.
1939		Dos Passos Adventures of a Young Man 211: Hit’s a blame sight more risky.
1940		O. Strange Sudden Takes the Trail 86: This blame’ sun is just naturally scorchin’ my scalp.
1953		J. Thompson Criminal (1993) 3: A gopher will have eaten up what blamed little lawn we have left.
1965		H. Rhodes Chosen Few (1966) 47: It’s the blamedest thing.
1974		(con. 1940s) E. Thompson Tattoo (1977) 218: She don’t care nothin about me and her father and the family until she gets into some blame trouble.
1977		G. Swarthout Melodeon 41: Here’s to the end of the blamed storm, and a Merry Christmas tomorrow.