What is the full farm of OK?

The full form of "OK" is often cited as "Oll Korrect," a humorous misspelling of "all correct" that originated in the 19th century. It became popular in the United States during the 1830s and 1840s, particularly with its association with the presidential campaign of Martin Van Buren, who was nicknamed "Old Kinderhook." However, there are other theories about its origin, but "Oll Korrect" remains the most widely accepted explanation.