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.
Well, there you have it. So have yourself an “Oll Korrect” day!