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1) A word that is used only when no other words come to your mind

2) A word that slips out of your mouth when it shouldn't
Teacher: Jimmy what are the first 10 numbers of PI?
Jimmy: Okay Dokey

Announcer: Bill im very sry but u are not the new president
Bill: Okay Dokey
Announcer: Thats it, u just agree
Bill: Yep
(sound of crashing and grunting of pain from where Bill is)
Announcer: Take that you bee-otch

by who nos, who cares July 09, 2006
Used as a light hearted agreement of a request or question.
Mary: Would you please put the kettle on?
Joseph: Okay dokey.
by Hempathy June 05, 2007