okay...ist eigentlich das korrekte Wort....aber was okay bedeutet bzw. wo es herkommt ist eine ganz andere Geschichte...per Wiki:
The earliest claimed usage of okay is a 1790 court record from Sumner County, Tennessee, discovered in 1859 by a Tennessee historian named Albigence Waldo Putnam, in which Andrew Jackson apparently said:
"proved a bill of sale from Hugh McGary to Gasper Mansker, for a Negro man, which was O.K."
However, the record is hand-written rather than typed, and James Parton's 1860 biography of Jackson suggested that it is really a poorly written O.R., which was the abbreviation used for Order Recorded. Woodford Heflin's (the Dictionary of American English staffer in charge of the "O.K." entry) 1941 photographic analysis also supports this conclusion.
Allen Walker Read identified the earliest known use of okay in print as 1839, in the March 23 edition of the Boston Morning Post (an American newspaper). The announcement of a trip by the Anti-Bell-Ringing Society (a "frolicsome group" according to Read) received attention from the Boston papers. Charles Gordon Greene wrote about the event using the line that is widely regarded as the first instance of this strain of okay, complete with gloss:
The above is from the Providence Journal, the editor of which is a little too quick on the trigger, on this occasion. We said not a word about our deputation passing "through the city" of Providence.—We said our brethren were going to New York in the Richmond, and they did go, as per Post of Thursday. The "Chairman of the Committee on Charity Lecture Bells", is one of the deputation, and perhaps if he should return to Boston, via Providence, he of the Journal, and his train-band, would have his "contribution box," et ceteras, o.k.—all correct—and cause the corks to fly, like sparks, upward.
Read gives a number of subsequent appearances in print: seven were accompanied ("glossed") with variations on "all correct" such as "oll korrect" or "ole kurreck"; five appeared with no accompanying explanation, suggesting that the word was expected to be well-known to readers and possibly in common colloquial use at the time.
A year later, supporters of the American Democratic political party claimed during the 1840 United States presidential election that it stood for "Old Kinderhook". "Kinderhook" was a nickname for a Democratic presidential candidate, Martin Van Buren, a native of Kinderhook, NY. "'Vote for OK' was snappier than using his Dutch name." In response, Whig opponents attributed OK, in the sense of "Oll Korrect", to Andrew Jackson's bad spelling.
The country-wide publicity surrounding the election appears to have been a critical event in okay's history, widely and suddenly popularizing it across America.
However, and importantly for one candidate etymology, earlier documented examples exist of African slaves in America using phonetically identical or strikingly similar words in a similar sense to okay. (See Wolof: waw-kay, below.)