Green’s Dictionary of Slang

(US) complete, absolute, utter.

1953		Randolph & Wilson Down in the Holler 275: pure dee: adj. Genuine, indubitable.
1954		J. Thompson Swell-Looking Babe 88: If he knew what kind of pure-d, rotten son-of-a-bitch he’d given his name to.
1959		A. Anderson ‘Lover Man’ in Lover Man 175: There would be a flash as the light hit his eyeglasses, and it would look like a pure-T miracle.
1962		P. Crump Burn, Killer, Burn! 158: Lame! You are a pure ’d lame.
1972		D. Jenkins Semi-Tough 65: That was pure dee football out there.
1972		O. Hawkins Ghetto Sketches 88: The Nazis were comin’ into power and they were givin’ the Jews pure idee hell.
1978		S. King Stand (1990) 1146: That was also a pure-d fact.
1980		J.L. Gwaltney Drylongso 33: This bleeding every month is a pure-dee pain where me and the chair come together.
1987		‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 217: We’re gonna show these suckers to an impartial research audience of red-blooded, non-Communist pure-dee American drive-in goers.
1999		‘Lance Howard’ Deadly Doves Ch. i: Dull panic crept into Whip’s mind and his heart stuttered. He wasn’t sure at first what boogered him, but even with half his spurs jangling he knew something was wrong. Puredee bad wrong.