Green’s Dictionary of Slang

(US) good, acceptable.

1935		Ted Yates This Is New York 5 Apr. [synd. col.] I think she should have let you know if everyhing was oakie-doakie.
1936		M. Harrison All the Trees were Green 305: Everything okey-doke up at the mansion?
1936		Archie Seale Man About Harlem 22 Aug. [synd. col.] Night club biz is putrid but the class restaurants are doing okey-dokey.
1941		J.M. Cain Mildred Pierce (1985) 370: He said gee that was swell of her, and if she really meant it, it was okey-doke by him.
1943		in W.C. Fields By Himself (1974) 436: Everything is going to be okel-dokel.
1953		L. Durst Jives of Dr. Hepcat (1989) 4: The game is okedoke but to some it’s like a cow without a cud, jaws working but not doing any good.
1954		(con. 1920s–30s) J.O. Killens Youngblood (1956) 281: ‘Can’t we be buddies?’ ‘It’s oaky doaky with me.’.
1970		C. Brown Down All the Days 195: I’m okey-doke now.
1986		L. Heinemann Paco’s Story (1987) 10: Everything is okeydokey. Hunky-dory. In-the-pink and couldn’t-be-sweeter.
1998		J. Lansdale Rumble Tumble 142: Don’t think ’cause you’re with some family [...] that everything is hokey-dokey.
2002		J. Ridley Conversation with the Mann 87: Fran was okeydoke, the kind of girl you thought of as one of the guys.