Green’s Dictionary of Slang

(US black) to swindle.

1996		P. Alson Ivy League Bookie 133: Bob wasn’t especially sympathetic when I told him about the unreturned phone calls. ‘You got okey-doked. The guy okeydoked you.’.
1996		Homebrew Digest No. 2213 3 Oct. 🌐 That the judges refused to be intimidated or okey-doked into awarding unearned medals is the best thing I’ve heard about this competition so far.