What Does The Letters OK Mean

We say OK all day long. “OK, I will take care of the trash,” or “OK, I will go to the store,” but what is the breakdown of the actual letters of OK?   You can use OK so many different ways. Even the simple thumb-to-forefinger hand gesture means OK.  It is an Interjection.  It can be used in a sarcastic way, meaning accepting something but not really wanting to. Happiness and sadness. Even pissed off.

But where did it come from and why do we not know what the O and the K actually mean?

I have done a ton of research on what the letters mean and all I could come up with was from the thesaurus. Here's how they broke it down:

1839, only survivor of a slang fad in Boston and New York c.1838-9 for abbreviations of common phrases with deliberate, jocular misspellings (cf. K.G. for "no go," as if spelled "know go"); in this case, "oll korrect." Further popularized by use as an election slogan by the O.K. Club, New York boosters.